diff --git a/src/mac/carbon/toolbar.cpp b/src/mac/carbon/toolbar.cpp
index 70866d776d..9806009b29 100644
--- a/src/mac/carbon/toolbar.cpp
+++ b/src/mac/carbon/toolbar.cpp
@@ -182,7 +182,7 @@ static pascal OSStatus wxMacToolBarToolControlEventHandler( EventHandlerCallRef
     return result ;
 }
 
-pascal OSStatus wxMacToolBarToolEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
+static pascal OSStatus wxMacToolBarToolEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
 {
     OSStatus result = eventNotHandledErr ;