diff --git a/src/port/dirmod.c b/src/port/dirmod.c
index e22a41c77e..369a222c51 100644
--- a/src/port/dirmod.c
+++ b/src/port/dirmod.c
@@ -57,7 +57,7 @@ pgrename(const char *from, const char *to)
 	 * and blocking other backends.
 	 */
 #if defined(WIN32) && !defined(__CYGWIN__)
-	while (!MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING))
+	while (!MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED))
 #else
 	while (rename(from, to) < 0)
 #endif