diff --git a/src/common/intl.cpp b/src/common/intl.cpp
index a7aaf30597..29132e9ad6 100644
--- a/src/common/intl.cpp
+++ b/src/common/intl.cpp
@@ -1422,15 +1422,54 @@ LCTYPE GetLCTYPEFormatFromLocalInfo(wxLocaleInfo index)
 /* static */
 wxString wxLocale::GetInfo(wxLocaleInfo index, wxLocaleCategory cat)
 {
-    wxUint32 lcid = LOCALE_USER_DEFAULT;
-    if ( wxGetLocale() )
+    const wxLanguageInfo * const
+        info = wxGetLocale() ? GetLanguageInfo(wxGetLocale()->GetLanguage())
+                             : NULL;
+    if ( !info )
     {
-        const wxLanguageInfo * const
-            info = GetLanguageInfo(wxGetLocale()->GetLanguage());
-        if ( info )
-            lcid = info->GetLCID();
+        // wxSetLocale() hadn't been called yet of failed, hence CRT must be
+        // using "C" locale -- but check it to detect bugs that would happen if
+        // this were not the case.
+        wxASSERT_MSG( strcmp(setlocale(LC_ALL, NULL), "C") == 0,
+                      wxS("You probably called setlocale() directly instead ")
+                      wxS("of calling wxSetLocale() and now there is a ")
+                      wxS("mismatch between C/C++ and Windows locale.\n")
+                      wxS("Things are going to break, use wxSetLocale() to ")
+                      wxS("avoid this!") );
+
+
+        // Return the hard coded values for C locale. This is really the right
+        // thing to do as there is no LCID we can use in the code below in this
+        // case, even LOCALE_INVARIANT is not quite the same as C locale (the
+        // only difference is that it uses %Y instead of %y in the date format
+        // but this difference is significant enough).
+        switch ( index )
+        {
+            case wxLOCALE_THOUSANDS_SEP:
+                return wxString();
+
+            case wxLOCALE_DECIMAL_POINT:
+                return ".";
+
+            case wxLOCALE_SHORT_DATE_FMT:
+                return "%m/%d/%y";
+
+            case wxLOCALE_LONG_DATE_FMT:
+                return "%A, %B %d, %Y";
+
+            case wxLOCALE_TIME_FMT:
+                return "%H:%M:%S";
+
+            case wxLOCALE_DATE_TIME_FMT:
+                return "%m/%d/%y %H:%M:%S";
+
+            default:
+                wxFAIL_MSG( "unknown wxLocaleInfo" );
+        }
     }
 
+    const wxUint32 lcid = info->GetLCID();
+
     wxString str;
 
     wxChar buf[256];
diff --git a/tests/test.cpp b/tests/test.cpp
index 5225ce76b1..6619dd21c5 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -472,8 +472,6 @@ bool TestApp::OnInit()
     if ( !TestAppBase::OnInit() )
         return false;
 
-    SetCLocale();
-
 #if wxUSE_GUI
     cout << "Test program for wxWidgets GUI features\n"
 #else