diff --git a/lib/icinga/clusterevents.cpp b/lib/icinga/clusterevents.cpp
index b53517dc2..0444225b2 100644
--- a/lib/icinga/clusterevents.cpp
+++ b/lib/icinga/clusterevents.cpp
@@ -970,6 +970,8 @@ Value ClusterEvents::UpdateExecutionsAPIHandler(const MessageOrigin::Ptr& origin
 	}
 
 	Dictionary::Ptr executions = checkable->GetExecutions();
+	if (!executions)
+		executions = new Dictionary();
 	Dictionary::Ptr newExecutions = params->Get("executions");
 	newExecutions->CopyTo(executions);
 	checkable->SetExecutions(executions);