diff --git a/lib/icinga/timeperiod.cpp b/lib/icinga/timeperiod.cpp
index c70227f9428..7bf646d2bc9 100644
--- a/lib/icinga/timeperiod.cpp
+++ b/lib/icinga/timeperiod.cpp
@@ -201,23 +201,6 @@ void TimePeriod::PurgeSegments(double end)
 	SetSegments(newSegments);
 }
 
-void TimePeriod::Merge(const TimePeriod::Ptr& timeperiod, bool include)
-{
-	Log(LogDebug, "TimePeriod")
-		<< "Merge TimePeriod '" << GetName() << "' with '" << timeperiod->GetName() << "' "
-		<< "Method: " << (include ? "include" : "exclude");
-
-	Array::Ptr segments = timeperiod->GetSegments();
-
-	if (segments) {
-		ObjectLock dlock(segments);
-		ObjectLock ilock(this);
-		for (const Dictionary::Ptr& segment : segments) {
-			include ? AddSegment(segment) : RemoveSegment(segment);
-		}
-	}
-}
-
 void TimePeriod::UpdateRegion(double begin, double end, bool clearExisting)
 {
 	if (clearExisting) {
diff --git a/lib/icinga/timeperiod.hpp b/lib/icinga/timeperiod.hpp
index 94591ef6954..e49ee93dcda 100644
--- a/lib/icinga/timeperiod.hpp
+++ b/lib/icinga/timeperiod.hpp
@@ -37,8 +37,6 @@ class TimePeriod final : public ObjectImpl<TimePeriod>
 	void RemoveSegment(const Dictionary::Ptr& segment);
 	void PurgeSegments(double end);
 
-	void Merge(const TimePeriod::Ptr& timeperiod, bool include = true);
-
 	void Dump();
 
 	static void UpdateTimerHandler();