diff --git a/devicehandlers/FixedSlotSequence.cpp b/devicehandlers/FixedSlotSequence.cpp
index 61959ac0..dae62bdd 100644
--- a/devicehandlers/FixedSlotSequence.cpp
+++ b/devicehandlers/FixedSlotSequence.cpp
@@ -91,6 +91,7 @@ uint32_t FixedSlotSequence::getLengthMs() const {
 ReturnValue_t FixedSlotSequence::checkSequence() const {
 	if(slotList.empty()) {
 		error << "Fixed Slot Sequence: Slot list is empty!" << std::endl;
+		return HasReturnvaluesIF::RETURN_FAILED;
 	}
 	auto slotIt = slotList.begin();
 	uint32_t count = 0;