diff --git a/libs/libc/audio/lib_buffer.c b/libs/libc/audio/lib_buffer.c
index 55d22ca902..bc551dc114 100644
--- a/libs/libc/audio/lib_buffer.c
+++ b/libs/libc/audio/lib_buffer.c
@@ -162,6 +162,7 @@ void apb_free(FAR struct ap_buffer_s *apb)
   if (refcount <= 1)
     {
       audinfo("Freeing %p\n", apb);
+      nxsem_destroy(&apb->sem);
       lib_ufree(apb);
     }
 }