diff --git a/osx.c b/osx.c
index 9b1e16d..264ad3a 100644
--- a/osx.c
+++ b/osx.c
@@ -85,7 +85,7 @@ static int flocking(FILE *fh, int mode, __int64 ofs, __int64 len)
     }
 
     _lock_file(fh);
-    if (_fseeki64_nolock(fh, ofs, SEEK_SET) != 0)
+    if (_fseeki64(fh, ofs, SEEK_SET) != 0)
         goto fail;
 
     if (len == 0) {