diff --git a/src/msw/uilocale.cpp b/src/msw/uilocale.cpp
index ff3d47baea..69311adde3 100644
--- a/src/msw/uilocale.cpp
+++ b/src/msw/uilocale.cpp
@@ -271,7 +271,7 @@ public:
         {
             // Use the default user locale for Windows 7 resp Windows 8.x and below
             wchar_t buf[LOCALE_NAME_MAX_LENGTH];
-            if (!::GetUserDefaultLocaleName(buf, LOCALE_NAME_MAX_LENGTH))
+            if (::GetUserDefaultLocaleName(buf, LOCALE_NAME_MAX_LENGTH))
             {
                 preferred.push_back(buf);
             }