diff --git a/src/apps/showimage/ImageCache.cpp b/src/apps/showimage/ImageCache.cpp
index 43bb9bf755..25e0547b1e 100644
--- a/src/apps/showimage/ImageCache.cpp
+++ b/src/apps/showimage/ImageCache.cpp
@@ -173,7 +173,7 @@ ImageCache::Stop()
 	thread_id thread;
 	while (true) {
 		thread = find_thread("image loader");
-		if (thread == B_NAME_NOT_FOUND)
+		if (thread < 0)
 			break;
 		wait_for_thread(thread, NULL);
 	}