diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index 486cddfd..1f92d46e 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -60,6 +60,8 @@ static void enterFullscreenMode(_GLFWwindow* window)
 
     [window->ns.view enterFullScreenMode:window->monitor->ns.screen
                              withOptions:nil];
+    
+    _glfwInputWindowFocus(window, GL_TRUE);
 }
 
 // Leave fullscreen mode