diff --git a/packages/core/src/reflection/reflection_capabilities.ts b/packages/core/src/reflection/reflection_capabilities.ts
index 32a5112659..634a4b48b9 100644
--- a/packages/core/src/reflection/reflection_capabilities.ts
+++ b/packages/core/src/reflection/reflection_capabilities.ts
@@ -25,7 +25,7 @@ export const INHERITED_CLASS = /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{/;
 export const INHERITED_CLASS_WITH_CTOR =
     /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{[\s\S]*constructor\s*\(/;
 export const INHERITED_CLASS_WITH_DELEGATE_CTOR =
-    /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{[\s\S]*constructor\s*\(\)\s*{\s+super\(\.\.\.arguments\)/;
+    /^class\s+[A-Za-z\d$_]*\s*extends\s+[^{]+{[\s\S]*constructor\s*\(\)\s*{\s*super\(\.\.\.arguments\)/;
 
 /**
  * Determine whether a stringified type is a class which delegates its constructor
diff --git a/packages/core/test/reflection/reflector_spec.ts b/packages/core/test/reflection/reflector_spec.ts
index 90a008238f..554496463d 100644
--- a/packages/core/test/reflection/reflector_spec.ts
+++ b/packages/core/test/reflection/reflector_spec.ts
@@ -201,6 +201,18 @@ class TestObj {
         expect(isDelegateCtor(ChildWithCtor.toString())).toBe(false);
       });
 
+      it('should support ES2015 classes when minified', () => {
+        // These classes are ES2015 in minified form
+        const ChildNoCtorMinified = 'class ChildNoCtor extends Parent{}';
+        const ChildWithCtorMinified = 'class ChildWithCtor extends Parent{constructor(){super()}}';
+        const ChildNoCtorPrivatePropsMinified =
+            'class ChildNoCtorPrivateProps extends Parent{constructor(){super(...arguments);this.x=10}}';
+
+        expect(isDelegateCtor(ChildNoCtorMinified)).toBe(true);
+        expect(isDelegateCtor(ChildNoCtorPrivatePropsMinified)).toBe(true);
+        expect(isDelegateCtor(ChildWithCtorMinified)).toBe(false);
+      });
+
       it('should not throw when no prototype on type', () => {
         // Cannot test arrow function here due to the compilation
         const dummyArrowFn = function() {};