diff --git a/src/engine.cpp b/src/engine.cpp
index be16c67..189aa83 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -116,7 +116,7 @@ bool engineIncOnTime() {
 	onTime += STEP_100ms;
 }
 
-void engineDecOffTime() {
+bool engineDecOffTime() {
 	bool res = false;
 	if (offTime != 0) {
 		offTime -= STEP_100ms;