diff --git a/src/parser/lval.js b/src/parser/lval.js
index 265aa90cf0..b8ee7bc63f 100644
--- a/src/parser/lval.js
+++ b/src/parser/lval.js
@@ -152,7 +152,6 @@ pp.parseMaybeDefault = function (startPos, startLoc, left) {
   if (!this.eat(tt.eq)) return left;
 
   let node = this.startNodeAt(startPos, startLoc);
-  node.operator = "=";
   node.left = left;
   node.right = this.parseMaybeAssign();
   return this.finishNode(node, "AssignmentPattern");
diff --git a/test/fixtures/harmony/uncategorised/152/expected.json b/test/fixtures/harmony/uncategorised/152/expected.json
index 23d4429400..045e5e565d 100644
--- a/test/fixtures/harmony/uncategorised/152/expected.json
+++ b/test/fixtures/harmony/uncategorised/152/expected.json
@@ -75,7 +75,6 @@
                 "column": 20
               }
             },
-            "operator": "=",
             "left": {
               "type": "ArrayPattern",
               "start": 11,
@@ -166,4 +165,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/153/expected.json b/test/fixtures/harmony/uncategorised/153/expected.json
index a64f77173c..2fbb48c993 100644
--- a/test/fixtures/harmony/uncategorised/153/expected.json
+++ b/test/fixtures/harmony/uncategorised/153/expected.json
@@ -75,7 +75,6 @@
                 "column": 24
               }
             },
-            "operator": "=",
             "left": {
               "type": "ObjectPattern",
               "start": 11,
@@ -236,4 +235,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/154/expected.json b/test/fixtures/harmony/uncategorised/154/expected.json
index b569d01097..5c0d184dea 100644
--- a/test/fixtures/harmony/uncategorised/154/expected.json
+++ b/test/fixtures/harmony/uncategorised/154/expected.json
@@ -105,7 +105,6 @@
                     "column": 26
                   }
                 },
-                "operator": "=",
                 "left": {
                   "type": "ObjectPattern",
                   "start": 13,
@@ -268,4 +267,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/155/expected.json b/test/fixtures/harmony/uncategorised/155/expected.json
index c4be10f5a3..446945cf11 100644
--- a/test/fixtures/harmony/uncategorised/155/expected.json
+++ b/test/fixtures/harmony/uncategorised/155/expected.json
@@ -122,7 +122,6 @@
                         "column": 27
                       }
                     },
-                    "operator": "=",
                     "left": {
                       "type": "ObjectPattern",
                       "start": 14,
@@ -289,4 +288,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/156/expected.json b/test/fixtures/harmony/uncategorised/156/expected.json
index c724ba84e8..f1b3b84818 100644
--- a/test/fixtures/harmony/uncategorised/156/expected.json
+++ b/test/fixtures/harmony/uncategorised/156/expected.json
@@ -123,7 +123,6 @@
                         "column": 17
                       }
                     },
-                    "operator": "=",
                     "left": {
                       "type": "ObjectPattern",
                       "start": 4,
@@ -289,4 +288,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/157/expected.json b/test/fixtures/harmony/uncategorised/157/expected.json
index 4b8376ff69..8f9e16207b 100644
--- a/test/fixtures/harmony/uncategorised/157/expected.json
+++ b/test/fixtures/harmony/uncategorised/157/expected.json
@@ -138,7 +138,6 @@
                           "column": 23
                         }
                       },
-                      "operator": "=",
                       "left": {
                         "type": "ObjectPattern",
                         "start": 10,
@@ -305,4 +304,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/159/expected.json b/test/fixtures/harmony/uncategorised/159/expected.json
index a30c8b7a8e..1f57c33a36 100644
--- a/test/fixtures/harmony/uncategorised/159/expected.json
+++ b/test/fixtures/harmony/uncategorised/159/expected.json
@@ -105,7 +105,6 @@
                     "column": 18
                   }
                 },
-                "operator": "=",
                 "left": {
                   "type": "Identifier",
                   "start": 13,
@@ -164,4 +163,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/160/expected.json b/test/fixtures/harmony/uncategorised/160/expected.json
index 388179a9da..b9dcf3ed65 100644
--- a/test/fixtures/harmony/uncategorised/160/expected.json
+++ b/test/fixtures/harmony/uncategorised/160/expected.json
@@ -75,7 +75,6 @@
                 "column": 16
               }
             },
-            "operator": "=",
             "left": {
               "type": "Identifier",
               "start": 11,
@@ -132,4 +131,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/161/expected.json b/test/fixtures/harmony/uncategorised/161/expected.json
index 44bf75a551..50711e7b4a 100644
--- a/test/fixtures/harmony/uncategorised/161/expected.json
+++ b/test/fixtures/harmony/uncategorised/161/expected.json
@@ -153,7 +153,6 @@
                           "column": 21
                         }
                       },
-                      "operator": "=",
                       "left": {
                         "type": "Identifier",
                         "start": 18,
@@ -216,4 +215,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/162/expected.json b/test/fixtures/harmony/uncategorised/162/expected.json
index bc6aa6ab7d..5ba4e49328 100644
--- a/test/fixtures/harmony/uncategorised/162/expected.json
+++ b/test/fixtures/harmony/uncategorised/162/expected.json
@@ -154,7 +154,6 @@
                           "column": 11
                         }
                       },
-                      "operator": "=",
                       "left": {
                         "type": "Identifier",
                         "start": 8,
@@ -216,4 +215,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/300/expected.json b/test/fixtures/harmony/uncategorised/300/expected.json
index ba241b2787..c19f8b6668 100644
--- a/test/fixtures/harmony/uncategorised/300/expected.json
+++ b/test/fixtures/harmony/uncategorised/300/expected.json
@@ -91,7 +91,6 @@
                 "column": 25
               }
             },
-            "operator": "=",
             "left": {
               "type": "Identifier",
               "start": 19,
@@ -147,4 +146,4 @@
       }
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/304/expected.json b/test/fixtures/harmony/uncategorised/304/expected.json
index 455984bf89..8fb4b5b979 100644
--- a/test/fixtures/harmony/uncategorised/304/expected.json
+++ b/test/fixtures/harmony/uncategorised/304/expected.json
@@ -119,7 +119,6 @@
                         "column": 38
                       }
                     },
-                    "operator": "=",
                     "left": {
                       "type": "Identifier",
                       "start": 15,
@@ -180,4 +179,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/305/expected.json b/test/fixtures/harmony/uncategorised/305/expected.json
index d0caf950d9..a47eedc258 100644
--- a/test/fixtures/harmony/uncategorised/305/expected.json
+++ b/test/fixtures/harmony/uncategorised/305/expected.json
@@ -120,7 +120,6 @@
                         "column": 28
                       }
                     },
-                    "operator": "=",
                     "left": {
                       "type": "Identifier",
                       "start": 5,
@@ -180,4 +179,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/306/expected.json b/test/fixtures/harmony/uncategorised/306/expected.json
index bfa5d16bc1..7a38265d31 100644
--- a/test/fixtures/harmony/uncategorised/306/expected.json
+++ b/test/fixtures/harmony/uncategorised/306/expected.json
@@ -86,7 +86,6 @@
                       "column": 28
                     }
                   },
-                  "operator": "=",
                   "left": {
                     "type": "Identifier",
                     "start": 5,
@@ -145,4 +144,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/307/expected.json b/test/fixtures/harmony/uncategorised/307/expected.json
index 6dbf417ffe..1fca349af8 100644
--- a/test/fixtures/harmony/uncategorised/307/expected.json
+++ b/test/fixtures/harmony/uncategorised/307/expected.json
@@ -120,7 +120,6 @@
                       "column": 7
                     }
                   },
-                  "operator": "=",
                   "left": {
                     "type": "Identifier",
                     "start": 2,
@@ -181,4 +180,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/308/expected.json b/test/fixtures/harmony/uncategorised/308/expected.json
index 394ef8f378..dcfb5844b9 100644
--- a/test/fixtures/harmony/uncategorised/308/expected.json
+++ b/test/fixtures/harmony/uncategorised/308/expected.json
@@ -123,7 +123,6 @@
                         "column": 7
                       }
                     },
-                    "operator": "=",
                     "left": {
                       "type": "Identifier",
                       "start": 2,
@@ -184,4 +183,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/309/expected.json b/test/fixtures/harmony/uncategorised/309/expected.json
index c9fa8ee649..274eb057e7 100644
--- a/test/fixtures/harmony/uncategorised/309/expected.json
+++ b/test/fixtures/harmony/uncategorised/309/expected.json
@@ -199,7 +199,6 @@
                                 "column": 14
                               }
                             },
-                            "operator": "=",
                             "left": {
                               "type": "Identifier",
                               "start": 9,
@@ -265,4 +264,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/harmony/uncategorised/310/expected.json b/test/fixtures/harmony/uncategorised/310/expected.json
index a334d92bdf..6b94dc1312 100644
--- a/test/fixtures/harmony/uncategorised/310/expected.json
+++ b/test/fixtures/harmony/uncategorised/310/expected.json
@@ -105,7 +105,6 @@
                     "column": 11
                   }
                 },
-                "operator": "=",
                 "left": {
                   "type": "Identifier",
                   "start": 6,
@@ -179,4 +178,4 @@
     ]
   },
   "comments": []
-}
\ No newline at end of file
+}