diff --git a/FL/glut.H b/FL/glut.H
index 85f702f61..ba7a70e68 100644
--- a/FL/glut.H
+++ b/FL/glut.H
@@ -62,8 +62,8 @@ public: // so the inline functions work
   void (*entry)(int);
   void (*visibility)(int);
   void (*special)(int, int x, int y);
-  Fl_Glut_Window(int w, int h, const char *);
-  Fl_Glut_Window(int x, int y, int w, int h, const char *);
+  Fl_Glut_Window(int w, int h, const char *t=0);
+  Fl_Glut_Window(int x, int y, int w, int h, const char *t=0);
   ~Fl_Glut_Window();
 };