diff --git a/arangod/V8Server/v8-vocbase.cpp b/arangod/V8Server/v8-vocbase.cpp
index c2dba09f35..a573e21a45 100644
--- a/arangod/V8Server/v8-vocbase.cpp
+++ b/arangod/V8Server/v8-vocbase.cpp
@@ -2685,7 +2685,7 @@ static v8::Handle<v8::Value> UpdateVocbaseCol (bool useCollection,
                                                    policy, 
                                                    options.waitForSync,
                                                    true,  // isPatch
-                                                   ! options.keepNull,
+                                                   options.keepNull,
                                                    argv));
   }
 #endif