diff --git a/gui/cppcheck_ko.ts b/gui/cppcheck_ko.ts
index f79828f0a..9539df973 100644
--- a/gui/cppcheck_ko.ts
+++ b/gui/cppcheck_ko.ts
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE TS>
-<TS version="2.1" language="ko-KR">
+<TS version="2.1" language="ko_KR">
 <context>
     <name>About</name>
     <message>