diff --git a/src/event_manager.c b/src/event_manager.c
index 109274f..38dc2cd 100644
--- a/src/event_manager.c
+++ b/src/event_manager.c
@@ -135,7 +135,12 @@ void handle_event() {
 
 int key_is_down(int code) {
 	if(code < 0 || code >= KEY_MAX)
-		return -1;
+	{
+#ifdef DEBUG
+		fprintf(stderr, "key_is_down(int): bad key code!\n");
+#endif
+		return 0;
+	}
 	else
 		return keys[code];
 }
diff --git a/src/event_manager.h b/src/event_manager.h
index e1ace4c..f32a914 100644
--- a/src/event_manager.h
+++ b/src/event_manager.h
@@ -53,7 +53,6 @@ void handle_event();
  *
  * @param code The key code.
  *
- * @return If down 1 will be returned, if the keycode is
- * invalid then -1 is returned, else 0.
+ * @return If down 1 will be returned, else 0.
  */
 int key_is_down(int code);