diff --git a/src/common/intl.cpp b/src/common/intl.cpp
index 711788c1e4..5852174e3a 100644
--- a/src/common/intl.cpp
+++ b/src/common/intl.cpp
@@ -665,7 +665,7 @@ bool wxLocale::Init(int language, int flags)
     wxString name = info->Description;
     wxString canonical = info->CanonicalName;
     wxString locale;
-    wxChar *retloc;
+    const wxChar *retloc;
 
     // Set the locale:
 #ifdef __UNIX__