diff --git a/dlls/kernel32/kernel32.spec b/dlls/kernel32/kernel32.spec
index 601644f10c8..fc9e3cc51bb 100644
--- a/dlls/kernel32/kernel32.spec
+++ b/dlls/kernel32/kernel32.spec
@@ -660,6 +660,7 @@
 @ stdcall GetTimeZoneInformation(ptr)
 @ stdcall GetUserDefaultLCID()
 @ stdcall GetUserDefaultLangID()
+@ stdcall GetUserDefaultLocaleName(ptr long)
 @ stdcall GetUserDefaultUILanguage()
 @ stdcall GetUserGeoID(long)
 @ stub GetVDMCurrentDirectories
diff --git a/dlls/kernel32/locale.c b/dlls/kernel32/locale.c
index 76076ea27f9..8d8042b1fee 100644
--- a/dlls/kernel32/locale.c
+++ b/dlls/kernel32/locale.c
@@ -3798,3 +3798,9 @@ INT WINAPI GetGeoInfoA(GEOID GeoId, GEOTYPE GeoType, LPSTR lpGeoData,
     FIXME("%d %d %p %d %d\n", GeoId, GeoType, lpGeoData, cchData, language);
     return 0;
 }
+
+INT WINAPI GetUserDefaultLocaleName(LPWSTR localename, int buffersize)
+{
+    FIXME("(%p, %d) stub!\n", localename,  buffersize);
+    return 0;
+}
diff --git a/include/winnls.h b/include/winnls.h
index 47c81d94d5f..b75e24a4b0a 100644
--- a/include/winnls.h
+++ b/include/winnls.h
@@ -767,6 +767,7 @@ WINBASEAPI INT         WINAPI GetTimeFormatW(LCID,DWORD,const SYSTEMTIME*,LPCWST
 #define                       GetTimeFormat WINELIB_NAME_AW(GetTimeFormat)
 WINBASEAPI LANGID      WINAPI GetUserDefaultLangID(void);
 WINBASEAPI LCID        WINAPI GetUserDefaultLCID(void);
+WINBASEAPI INT         WINAPI GetUserDefaultLocaleName(LPWSTR,int);
 WINBASEAPI LANGID      WINAPI GetUserDefaultUILanguage(void);
 WINBASEAPI GEOID       WINAPI GetUserGeoID(GEOCLASS);
 WINBASEAPI BOOL        WINAPI IsDBCSLeadByte(BYTE);