diff --git a/src/babel/traversal/path/inference/index.js b/src/babel/traversal/path/inference/index.js
index ef1fc1aa88..2fa3b3c66f 100644
--- a/src/babel/traversal/path/inference/index.js
+++ b/src/babel/traversal/path/inference/index.js
@@ -76,6 +76,8 @@ function _isBaseType(baseName: string, type?, soft?): boolean {
     return t.isAnyTypeAnnotation(type);
   } else if (baseName === "mixed") {
     return t.isMixedTypeAnnotation(type);
+  } else if (baseName === "void") {
+    return t.isVoidTypeAnnotation(type);
   } else {
     if (soft) {
       return false;
@@ -105,6 +107,19 @@ export function couldBeBaseType(name: string): boolean {
   }
 }
 
+/**
+ * Description
+ */
+
+export function baseTypeStrictlyMatches(right: NodePath) {
+  var left = this.getTypeAnnotation();
+  right = right.getTypeAnnotation();
+
+  if (!t.isAnyTypeAnnotation() && t.isFlowBaseAnnotation(left)) {
+    return right.type === left.type;
+  }
+}
+
 /**
  * Description
  */