diff --git a/src/game/ObjectGuid.h b/src/game/ObjectGuid.h
index c8d3661ef..6f85cb2cc 100644
--- a/src/game/ObjectGuid.h
+++ b/src/game/ObjectGuid.h
@@ -162,6 +162,7 @@ class MANGOS_DLL_SPEC ObjectGuid
 
         TypeID GetTypeId() const { return GetTypeId(GetHigh()); }
 
+        bool operator! () const { return IsEmpty(); }
         bool operator== (ObjectGuid const& guid) const { return GetRawValue() == guid.GetRawValue(); }
         bool operator!= (ObjectGuid const& guid) const { return GetRawValue() != guid.GetRawValue(); }
         bool operator< (ObjectGuid const& guid) const { return GetRawValue() < guid.GetRawValue(); }
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 686738a30..afad6b882 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "11487"
+ #define REVISION_NR "11488"
 #endif // __REVISION_NR_H__