diff --git a/src/osx/cocoa/window.mm b/src/osx/cocoa/window.mm
index ae4c794ec0..c34c897812 100644
--- a/src/osx/cocoa/window.mm
+++ b/src/osx/cocoa/window.mm
@@ -651,6 +651,13 @@ void wxOSX_mouseEvent(NSView* self, SEL _cmd, NSEvent *event)
     impl->mouseEvent(event, self, _cmd);
 }
 
+BOOL wxOSX_acceptsFirstMouse(NSView* self, SEL _cmd, NSEvent *event)
+{
+    // This is needed to support click through, otherwise the first click on a window
+    // will not do anything unless it is the active window already.
+    return YES;
+}
+
 void wxOSX_keyEvent(NSView* self, SEL _cmd, NSEvent *event)
 {
     wxWidgetCocoaImpl* impl = (wxWidgetCocoaImpl* ) wxWidgetImpl::FindFromWXWidget( self );
@@ -1119,6 +1126,8 @@ void wxOSXCocoaClassAddWXMethods(Class c)
     wxOSX_CLASS_ADD_METHOD(c, @selector(mouseDragged:), (IMP) wxOSX_mouseEvent, "v@:@" )
     wxOSX_CLASS_ADD_METHOD(c, @selector(rightMouseDragged:), (IMP) wxOSX_mouseEvent, "v@:@" )
     wxOSX_CLASS_ADD_METHOD(c, @selector(otherMouseDragged:), (IMP) wxOSX_mouseEvent, "v@:@" )
+    
+    wxOSX_CLASS_ADD_METHOD(c, @selector(acceptsFirstMouse:), (IMP) wxOSX_acceptsFirstMouse, "v@:@" )
 
     wxOSX_CLASS_ADD_METHOD(c, @selector(scrollWheel:), (IMP) wxOSX_mouseEvent, "v@:@" )
     wxOSX_CLASS_ADD_METHOD(c, @selector(mouseEntered:), (IMP) wxOSX_mouseEvent, "v@:@" )