diff --git a/src/locale/duplocale.c b/src/locale/duplocale.c
index dd445d46..5f01e137 100644
--- a/src/locale/duplocale.c
+++ b/src/locale/duplocale.c
@@ -6,6 +6,6 @@ locale_t duplocale(locale_t old)
 {
 	locale_t new;
 	new = calloc(1, sizeof *new);
-	if (new) memcpy(new, old, sizeof *new);
+	if (new && old != LC_GLOBAL_LOCALE) memcpy(new, old, sizeof *new);
 	return new;
 }