diff --git a/src/gtk/treeentry_gtk.c b/src/gtk/treeentry_gtk.c
index a9aed08458..e652f83231 100644
--- a/src/gtk/treeentry_gtk.c
+++ b/src/gtk/treeentry_gtk.c
@@ -9,6 +9,9 @@
 
 #ifdef __VMS
 #include <types.h>
+typedef pid_t GPid;
+#define G_GNUC_INTERNAL 
+#define GSEAL(x) x
 #endif
 
 #include "wx/gtk/treeentry_gtk.h"