diff --git a/src/sound_effects_cache.cc b/src/sound_effects_cache.cc
index e7af03d..eaae80c 100644
--- a/src/sound_effects_cache.cc
+++ b/src/sound_effects_cache.cc
@@ -176,7 +176,7 @@ int soundEffectsCacheFileOpen(const char* fname, int mode, ...)
 
     void* data;
     CacheEntry* cacheHandle;
-    if (cacheLock(gSoundEffectsCache, tag, &data, &cacheHandle) == -1) {
+    if (!cacheLock(gSoundEffectsCache, tag, &data, &cacheHandle)) {
         return -1;
     }