diff --git a/glfw/cocoa_window.m b/glfw/cocoa_window.m
index feba4fdaf..a4c234d09 100644
--- a/glfw/cocoa_window.m
+++ b/glfw/cocoa_window.m
@@ -558,6 +558,7 @@ - (void)cleanup {
 - (BOOL)windowShouldClose:(id)sender
 {
     (void)sender;
+    if (window == nil) return YES;
     _glfwInputWindowCloseRequest(window);
     return NO;
 }