diff --git a/src/server/game/Entities/Object/Object.cpp b/src/server/game/Entities/Object/Object.cpp
index fc9032bc448..1bc99d57d34 100644
--- a/src/server/game/Entities/Object/Object.cpp
+++ b/src/server/game/Entities/Object/Object.cpp
@@ -1059,6 +1059,8 @@ void Object::SetFlag(uint16 index, uint32 newFlag)
 void Object::RemoveFlag(uint16 index, uint32 oldFlag)
 {
     ASSERT(index < m_valuesCount || PrintIndexError(index, true));
+    ASSERT(m_uint32Values);
+
     uint32 oldval = m_uint32Values[ index ];
     uint32 newval = oldval & ~oldFlag;