diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index 4da360b..8de7162 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -164,6 +164,9 @@
     case JS_PROXY_TYPE:
       JSProxy::cast(this)->JSProxyVerify();
       break;
+    case JS_FUNCTION_PROXY_TYPE:
+      JSFunctionProxy::cast(this)->JSFunctionProxyVerify();
+      break;
     case FOREIGN_TYPE:
       Foreign::cast(this)->ForeignVerify();
       break;
@@ -257,9 +260,9 @@
              (map()->inobject_properties() + properties()->length() -
               map()->NextFreePropertyIndex()));
   }
-  ASSERT(map()->has_fast_elements() ==
-         (elements()->map() == GetHeap()->fixed_array_map() ||
-          elements()->map() == GetHeap()->fixed_cow_array_map()));
+  ASSERT_EQ(map()->has_fast_elements(),
+            (elements()->map() == GetHeap()->fixed_array_map() ||
+             elements()->map() == GetHeap()->fixed_cow_array_map()));
   ASSERT(map()->has_fast_elements() == HasFastElements());
 }
 
@@ -536,6 +539,15 @@
   VerifyPointer(handler());
 }
 
+
+void JSFunctionProxy::JSFunctionProxyVerify() {
+  ASSERT(IsJSFunctionProxy());
+  JSProxyVerify();
+  VerifyPointer(call_trap());
+  VerifyPointer(construct_trap());
+}
+
+
 void Foreign::ForeignVerify() {
   ASSERT(IsForeign());
 }