diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js b/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
index 58ee8e97e4..4344f2cc71 100644
--- a/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
@@ -310,8 +310,11 @@ export default function () {
                     } else if (id.isObjectPattern()) {
                       for (let i = 0; i < id.node.properties.length; i++) {
                         const prop = id.node.properties[i];
+                        let propValue = prop.value;
                         if (!t.isRestProperty(prop)) {
-                          const propValue = prop.value;
+                          if (t.isAssignmentPattern(propValue)) {
+                            propValue = propValue.left;
+                          }
                           addTo(exports, propValue.name, propValue);
                           exportsToInsert.push(buildExportsAssignment(propValue, propValue));
                           nonHoistedExportNames[propValue.name] = true;
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/actual.js b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/actual.js
new file mode 100644
index 0000000000..03958a0709
--- /dev/null
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/actual.js
@@ -0,0 +1 @@
+export const { foo, bar = 1 } = {};
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/expected.js b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/expected.js
new file mode 100644
index 0000000000..2f72b34fb6
--- /dev/null
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/expected.js
@@ -0,0 +1,5 @@
+"use strict";
+
+const { foo, bar = 1 } = {};
+exports.foo = foo;
+exports.bar = bar;
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/expected.js b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/expected.js
index ff1a912e33..83cc6e03df 100644
--- a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/expected.js
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
 const { foo: bar, baz } = {};
-exports.baz = baz;
 exports.bar = bar;
+exports.baz = baz;