diff --git a/src/mac/carbon/window.cpp b/src/mac/carbon/window.cpp
index 480a56083d..640050428b 100644
--- a/src/mac/carbon/window.cpp
+++ b/src/mac/carbon/window.cpp
@@ -377,6 +377,8 @@ static void MacMenuBeforeDisplay( wxMenu* menu );
 
 bool wxWindowMac::DoPopupMenu(wxMenu *menu, int x, int y)
 {
+    wxCHECK_MSG( menu != NULL, FALSE, wxT("invalid popup-menu") );
+
     menu->SetInvokingWindow(this);
     menu->UpdateUI();
     ClientToScreen( &x , &y ) ;
diff --git a/src/mac/window.cpp b/src/mac/window.cpp
index 480a56083d..640050428b 100644
--- a/src/mac/window.cpp
+++ b/src/mac/window.cpp
@@ -377,6 +377,8 @@ static void MacMenuBeforeDisplay( wxMenu* menu );
 
 bool wxWindowMac::DoPopupMenu(wxMenu *menu, int x, int y)
 {
+    wxCHECK_MSG( menu != NULL, FALSE, wxT("invalid popup-menu") );
+
     menu->SetInvokingWindow(this);
     menu->UpdateUI();
     ClientToScreen( &x , &y ) ;
diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 3eacbce049..4822d5b199 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -1899,6 +1899,8 @@ static void wxYieldForCommandsOnly()
 
 bool wxWindowMSW::DoPopupMenu(wxMenu *menu, int x, int y)
 {
+    wxCHECK_MSG( menu != NULL, FALSE, wxT("invalid popup-menu") );
+
     menu->SetInvokingWindow(this);
     menu->UpdateUI();