diff --git a/lib/icinga/checkable-script.cpp b/lib/icinga/checkable-script.cpp
index fe08f32d3..764a9f851 100644
--- a/lib/icinga/checkable-script.cpp
+++ b/lib/icinga/checkable-script.cpp
@@ -14,7 +14,10 @@ static void CheckableProcessCheckResult(const CheckResult::Ptr& cr)
 	ScriptFrame *vframe = ScriptFrame::GetCurrentFrame();
 	Checkable::Ptr self = vframe->Self;
 	REQUIRE_NOT_NULL(self);
-	self->ProcessCheckResult(cr);
+
+	if (cr) {
+		self->ProcessCheckResult(cr);
+	}
 }
 
 Object::Ptr Checkable::GetPrototype()