diff --git a/gtk2_ardour/i18n.h b/gtk2_ardour/i18n.h
index d3a8e70cb2..5d68c79edd 100644
--- a/gtk2_ardour/i18n.h
+++ b/gtk2_ardour/i18n.h
@@ -11,6 +11,6 @@
 #define _(Text)  dgettext (PACKAGE,Text)
 #define N_(Text) gettext_noop (Text)
 #define X_(Text) Text
-#define I18N(Array) internationalize (PACKAGE, Array)
+#define I18N(Array) PBD::internationalize (PACKAGE, Array)
 
 #endif // __i18n_h__