diff --git a/src/m_menu.c b/src/m_menu.c
index 1a3c54738..e9b24e7ab 100644
--- a/src/m_menu.c
+++ b/src/m_menu.c
@@ -2703,8 +2703,8 @@ boolean M_Responder(event_t *ev)
 				M_QuitSRB2(0);
 				return true;
 
-			case KEY_F11: // Gamma Level
-				CV_AddValue(&cv_globalgamma, 1);
+			case KEY_F11: // Fullscreen
+				CV_AddValue(&cv_fullscreen, 1);
 				return true;
 
 			// Spymode on F12 handled in game logic