diff --git a/libao/libao-async.rkt b/libao/libao-async.rkt
index 0d45261..54f63d8 100644
--- a/libao/libao-async.rkt
+++ b/libao/libao-async.rkt
@@ -203,7 +203,7 @@
         (displayln "Continuing ao play thread")
         (mutex-lock (ao-shm-mutex shm))
         (set-ao-shm-paused! shm pause)
-        (mutex-unlock (ao-shm-mutex.shm))
+        (mutex-unlock (ao-shm-mutex shm))
         (os-semaphore-post (ao-shm-pause-sem shm)))
       )
   )