diff --git a/BasiliskII/src/MacOSX/Emulator.h b/BasiliskII/src/MacOSX/Emulator.h
index f89d65e6..b8b7e363 100644
--- a/BasiliskII/src/MacOSX/Emulator.h
+++ b/BasiliskII/src/MacOSX/Emulator.h
@@ -61,6 +61,7 @@
 - (IBAction) Suspend:		(id)sender;
 - (IBAction) PowerKey:		(id)sender;
 - (IBAction) Restart:		(id)sender;
+- (IBAction) ScreenHideShow:(NSButton *)sender;
 - (IBAction) Snapshot:		(id)sender;
 - (IBAction) SpeedChange:	(NSSlider *)sender;
 - (IBAction) Resume:		(id)sender;
diff --git a/BasiliskII/src/MacOSX/Emulator.mm b/BasiliskII/src/MacOSX/Emulator.mm
index aab9a3bb..12467c22 100644
--- a/BasiliskII/src/MacOSX/Emulator.mm
+++ b/BasiliskII/src/MacOSX/Emulator.mm
@@ -204,6 +204,13 @@
 	[xPRAM	resume];
 }
 
+- (IBAction) ScreenHideShow: (NSButton *)sender;
+{
+	WarningSheet(@"Nigel doesn't know how to shrink or grow this window",
+				 @"Maybe you can grab the source code and have a go yourself?",
+				 nil, win);
+}
+
 - (IBAction) Snapshot: (id) sender
 {
 	if ( screen == nil || uaeCreated == NO  )
@@ -427,4 +434,4 @@ uint8 lastXPRAM[XPRAM_SIZE];		// Copy of PRAM
 	}
 }
 
-@end
\ No newline at end of file
+@end