diff --git a/src/lib/fcitx-utils/i18nstring.cpp b/src/lib/fcitx-utils/i18nstring.cpp
index da9dfdd60..3d78a18b4 100644
--- a/src/lib/fcitx-utils/i18nstring.cpp
+++ b/src/lib/fcitx-utils/i18nstring.cpp
@@ -12,6 +12,10 @@
 #include "charutils.h"
 #include "misc.h"
 
+#ifndef LC_MESSAGES
+#define LC_MESSAGES LC_ALL
+#endif
+
 namespace fcitx {
 const std::string &I18NString::match(const std::string &locale_) const {
     std::string locale = locale_;