diff --git a/include/condition_variable b/include/condition_variable
index 124d388..fc3ac3d 100644
--- a/include/condition_variable
+++ b/include/condition_variable
@@ -243,7 +243,7 @@
                                  _Predicate __pred)
 {
     return wait_until(__lock, chrono::steady_clock::now() + __d,
-                      _STD::move(__pred));
+                      _VSTD::move(__pred));
 }
 
 _LIBCPP_VISIBLE