diff --git a/src/locale.cpp b/src/locale.cpp
index 7d0e6298..97c2102c 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -1393,7 +1393,7 @@ codecvt<wchar_t, char, mbstate_t>::codecvt(const char* nm, size_t refs)
 
 codecvt<wchar_t, char, mbstate_t>::~codecvt()
 {
-    if (__l != 0)
+    if (__l != _LIBCPP_GET_C_LOCALE)
         freelocale(__l);
 }