diff --git a/src/event/Loop.cxx b/src/event/Loop.cxx
index d673b558a..a5e54c98c 100644
--- a/src/event/Loop.cxx
+++ b/src/event/Loop.cxx
@@ -276,8 +276,8 @@ EventLoop::Run() noexcept
 
 	assert(IsInside());
 	assert(!quit);
-	assert(!quit_injected);
 #ifdef HAVE_THREADED_EVENT_LOOP
+	assert(!quit_injected);
 	assert(alive);
 	assert(busy);