diff --git a/src/osx/cocoa/menu.mm b/src/osx/cocoa/menu.mm
index 3127597356..705fdc8947 100644
--- a/src/osx/cocoa/menu.mm
+++ b/src/osx/cocoa/menu.mm
@@ -186,6 +186,7 @@ protected :
 
 wxMenuCocoaImpl::~wxMenuCocoaImpl()
 {
+    [m_osxMenu setDelegate:nil];
     [m_osxMenu release];
 }
 
diff --git a/src/osx/cocoa/nonownedwnd.mm b/src/osx/cocoa/nonownedwnd.mm
index f442eef85a..ac233c8e19 100644
--- a/src/osx/cocoa/nonownedwnd.mm
+++ b/src/osx/cocoa/nonownedwnd.mm
@@ -227,6 +227,7 @@ wxNonOwnedWindowCocoaImpl::wxNonOwnedWindowCocoaImpl()
     
 wxNonOwnedWindowCocoaImpl::~wxNonOwnedWindowCocoaImpl()
 {
+    [m_macWindow setDelegate:nil];
     [m_macWindow release];
 }
 
diff --git a/src/osx/cocoa/toolbar.mm b/src/osx/cocoa/toolbar.mm
index 50ff8949a4..b93b614850 100644
--- a/src/osx/cocoa/toolbar.mm
+++ b/src/osx/cocoa/toolbar.mm
@@ -633,6 +633,7 @@ wxToolBar::~wxToolBar()
         if (m_macUsesNativeToolbar)
             MacInstallNativeToolbar( false );
 
+        [(NSToolbar*)m_macToolbar setDelegate:nil];
         [(NSToolbar*)m_macToolbar release];
         m_macToolbar = NULL;
     }