diff --git a/src/common/appbase.cpp b/src/common/appbase.cpp
index 32db9d127e..53d05a50fd 100644
--- a/src/common/appbase.cpp
+++ b/src/common/appbase.cpp
@@ -509,10 +509,12 @@ GSocketGUIFunctionsTable* wxConsoleAppTraitsBase::GetSocketGUIFunctionsTable()
 // wxAppTraits
 // ----------------------------------------------------------------------------
 
+#if wxUSE_INTL
 void wxAppTraitsBase::SetLocale()
 {
     setlocale(LC_ALL, "");
 }
+#endif
 
 #ifdef __WXDEBUG__
 
diff --git a/src/gtk/utilsgtk.cpp b/src/gtk/utilsgtk.cpp
index c50a21629c..d3df80a878 100644
--- a/src/gtk/utilsgtk.cpp
+++ b/src/gtk/utilsgtk.cpp
@@ -329,10 +329,12 @@ static wxString GetSM()
 // wxGUIAppTraits
 //-----------------------------------------------------------------------------
 
+#if wxUSE_INTL
 void wxGUIAppTraits::SetLocale()
 {
     gtk_set_locale();
 }
+#endif
 
 #ifdef __WXDEBUG__
 
diff --git a/src/gtk1/utilsgtk.cpp b/src/gtk1/utilsgtk.cpp
index cefd4eddda..29fb44c8c6 100644
--- a/src/gtk1/utilsgtk.cpp
+++ b/src/gtk1/utilsgtk.cpp
@@ -202,8 +202,10 @@ wxString wxGUIAppTraits::GetDesktopEnvironment() const
     return wxEmptyString;
 }
 
+#if wxUSE_INTL
 void wxGUIAppTraits::SetLocale()
 {
     gtk_set_locale();
 }
+#endif