diff --git a/blink/blinkenlights.c b/blink/blinkenlights.c
index fa08a0ca9..f2fb48dae 100644
--- a/blink/blinkenlights.c
+++ b/blink/blinkenlights.c
@@ -3010,7 +3010,7 @@ static void OnMouse(const char *p) {
 }
 
 static void OnHelp(void) {
-  dialog = HELP;
+  dialog = dialog == HELP ? NULL : HELP;
 }
 
 static void HandleKeyboard(const char *k) {