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-rw-r--r--libio/genops.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libio/genops.c b/libio/genops.c
index 28bb0f980b..ad6c7f7ea4 100644
--- a/libio/genops.c
+++ b/libio/genops.c
@@ -48,7 +48,9 @@ flush_cleanup (void *not_used)
 {
   if (run_fp != NULL)
     _IO_funlockfile (run_fp);
+#ifdef _IO_MTSAFE_IO
   _IO_lock_unlock (list_all_lock);
+#endif
 }
 
 void