diff --git a/src/event/Call.cxx b/src/event/Call.cxx
index f3eb82235..ded252645 100644
--- a/src/event/Call.cxx
+++ b/src/event/Call.cxx
@@ -79,7 +79,7 @@ private:
 void
 BlockingCall(EventLoop &loop, std::function<void()> &&f)
 {
-	if (loop.IsInside()) {
+	if (loop.IsInsideOrNull()) {
 		/* we're already inside the loop - we can simply call
 		   the function */
 		f();