diff --git a/engines/zvision/actions.cpp b/engines/zvision/actions.cpp
index 7b9050f47ad6..c3f85fe247a7 100644
--- a/engines/zvision/actions.cpp
+++ b/engines/zvision/actions.cpp
@@ -607,6 +607,8 @@ ActionTimer::~ActionTimer() {
 }
 
 bool ActionTimer::execute() {
+	if (_engine->getScriptManager()->getSideFX(_slotkey))
+		return true;
 	_engine->getScriptManager()->addSideFX(new TimerNode(_engine, _slotkey, _time->getValue()));
 	return true;
 }