diff --git a/devicehandlers/FixedSlotSequence.cpp b/devicehandlers/FixedSlotSequence.cpp
index 00020d68..860a643b 100644
--- a/devicehandlers/FixedSlotSequence.cpp
+++ b/devicehandlers/FixedSlotSequence.cpp
@@ -90,6 +90,7 @@ uint32_t FixedSlotSequence::getLengthMs() const {
 ReturnValue_t FixedSlotSequence::checkSequence() const {
 	if(slotList.empty()) {
 	    sif::error << "Fixed Slot Sequence: Slot list is empty!" << std::endl;
+	    return HasReturnvaluesIF::RETURN_FAILED;
 	}
     // Iterate through slotList and check successful creation.
 	// Checks if timing is ok (must be ascending) and if all handlers were found.