diff --git a/src/common/menucmn.cpp b/src/common/menucmn.cpp
index ae70495bef..65459efdd3 100644
--- a/src/common/menucmn.cpp
+++ b/src/common/menucmn.cpp
@@ -125,6 +125,7 @@ void wxMenuBase::Init(long style)
     m_style = style;
     m_clientData = (void *)NULL;
     m_eventHandler = this;
+    m_callback = (wxFunction) NULL;
 }
 
 wxMenuBase::~wxMenuBase()