diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index e1fdfc258e0ce..1070020401062 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -2709,7 +2709,7 @@ namespace ts {
                         }
                     }
 
-                    if (constructorSymbol) {
+                    if (constructorSymbol && constructorSymbol.valueDeclaration) {
                         // Declare a 'member' if the container is an ES5 class or ES6 constructor
                         constructorSymbol.members = constructorSymbol.members || createSymbolTable();
                         // It's acceptable for multiple 'this' assignments of the same identifier to occur
diff --git a/tests/baselines/reference/importAliasModuleExports.errors.txt b/tests/baselines/reference/importAliasModuleExports.errors.txt
index ea3dd9ef0e018..9cd2cd9768ecf 100644
--- a/tests/baselines/reference/importAliasModuleExports.errors.txt
+++ b/tests/baselines/reference/importAliasModuleExports.errors.txt
@@ -1,5 +1,8 @@
 tests/cases/conformance/salsa/main.js(2,13): error TS2339: Property 'foo' does not exist on type 'Alias'.
-tests/cases/conformance/salsa/main.js(4,9): error TS2339: Property 'foo' does not exist on type 'Alias'.
+tests/cases/conformance/salsa/main.js(3,13): error TS2339: Property 'func' does not exist on type 'Alias'.
+tests/cases/conformance/salsa/main.js(3,38): error TS2339: Property '_func' does not exist on type 'Alias'.
+tests/cases/conformance/salsa/main.js(5,9): error TS2339: Property 'foo' does not exist on type 'Alias'.
+tests/cases/conformance/salsa/main.js(6,9): error TS2339: Property 'func' does not exist on type 'Alias'.
 
 
 ==== tests/cases/conformance/salsa/mod1.js (0 errors) ====
@@ -8,13 +11,21 @@ tests/cases/conformance/salsa/main.js(4,9): error TS2339: Property 'foo' does no
     }
     module.exports = Alias;
     
-==== tests/cases/conformance/salsa/main.js (2 errors) ====
+==== tests/cases/conformance/salsa/main.js (5 errors) ====
     import A from './mod1'
     A.prototype.foo = 0
                 ~~~
 !!! error TS2339: Property 'foo' does not exist on type 'Alias'.
+    A.prototype.func = function() { this._func = 0; }
+                ~~~~
+!!! error TS2339: Property 'func' does not exist on type 'Alias'.
+                                         ~~~~~
+!!! error TS2339: Property '_func' does not exist on type 'Alias'.
     new A().bar
     new A().foo
             ~~~
 !!! error TS2339: Property 'foo' does not exist on type 'Alias'.
+    new A().func()
+            ~~~~
+!!! error TS2339: Property 'func' does not exist on type 'Alias'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/importAliasModuleExports.symbols b/tests/baselines/reference/importAliasModuleExports.symbols
index 4ab081d608f8f..4d67eb8e197ef 100644
--- a/tests/baselines/reference/importAliasModuleExports.symbols
+++ b/tests/baselines/reference/importAliasModuleExports.symbols
@@ -20,6 +20,12 @@ A.prototype.foo = 0
 >A : Symbol(A, Decl(main.js, 0, 6))
 >prototype : Symbol(A.prototype)
 
+A.prototype.func = function() { this._func = 0; }
+>A.prototype : Symbol(A.prototype)
+>A : Symbol(A, Decl(main.js, 0, 6))
+>prototype : Symbol(A.prototype)
+>this : Symbol(A, Decl(mod1.js, 0, 0))
+
 new A().bar
 >new A().bar : Symbol(A.bar, Decl(mod1.js, 0, 13))
 >A : Symbol(A, Decl(main.js, 0, 6))
@@ -28,3 +34,6 @@ new A().bar
 new A().foo
 >A : Symbol(A, Decl(main.js, 0, 6))
 
+new A().func()
+>A : Symbol(A, Decl(main.js, 0, 6))
+
diff --git a/tests/baselines/reference/importAliasModuleExports.types b/tests/baselines/reference/importAliasModuleExports.types
index 1303ba6e8c4b4..6c9b05095497e 100644
--- a/tests/baselines/reference/importAliasModuleExports.types
+++ b/tests/baselines/reference/importAliasModuleExports.types
@@ -26,6 +26,20 @@ A.prototype.foo = 0
 >foo : any
 >0 : 0
 
+A.prototype.func = function() { this._func = 0; }
+>A.prototype.func = function() { this._func = 0; } : () => void
+>A.prototype.func : any
+>A.prototype : A
+>A : typeof A
+>prototype : A
+>func : any
+>function() { this._func = 0; } : () => void
+>this._func = 0 : 0
+>this._func : any
+>this : A
+>_func : any
+>0 : 0
+
 new A().bar
 >new A().bar : () => number
 >new A() : A
@@ -38,3 +52,10 @@ new A().foo
 >A : typeof A
 >foo : any
 
+new A().func()
+>new A().func() : any
+>new A().func : any
+>new A() : A
+>A : typeof A
+>func : any
+
diff --git a/tests/cases/conformance/salsa/importAliasModuleExports.ts b/tests/cases/conformance/salsa/importAliasModuleExports.ts
index 5e850206676a2..691dde2026942 100644
--- a/tests/cases/conformance/salsa/importAliasModuleExports.ts
+++ b/tests/cases/conformance/salsa/importAliasModuleExports.ts
@@ -11,5 +11,7 @@ module.exports = Alias;
 // @filename: main.js
 import A from './mod1'
 A.prototype.foo = 0
+A.prototype.func = function() { this._func = 0; }
 new A().bar
 new A().foo
+new A().func()