diff --git a/src/org/mozilla/javascript/NativeReflect.java b/src/org/mozilla/javascript/NativeReflect.java
index 907996f829..7ae6a13e7b 100644
--- a/src/org/mozilla/javascript/NativeReflect.java
+++ b/src/org/mozilla/javascript/NativeReflect.java
@@ -340,7 +340,7 @@ private static Object set(Context cx, Scriptable scope, Scriptable thisObj, Obje
                     return true;
                 }
 
-                if (descriptor.get("configurable") == Boolean.FALSE) {
+                if (Boolean.FALSE.equals(descriptor.get("configurable"))) {
                     return false;
                 }
             }