diff -up xmakemol-5.16/edit.c.pointertype xmakemol-5.16/edit.c
--- xmakemol-5.16/edit.c.pointertype	2005-03-07 10:14:44.000000000 +0000
+++ xmakemol-5.16/edit.c	2024-01-30 11:08:10.690500512 +0000
@@ -1758,7 +1758,7 @@ make_scale_coords_dialog (Widget parent)
 
   int n = 0;
   Widget atob, btoa, child, rc;
-  XmString label = "";
+  XmString label = XmStringCreateSimple("");
 
   if (! scale_coords_dialog)
     {
diff -up xmakemol-5.16/frames.c.pointertype xmakemol-5.16/frames.c
--- xmakemol-5.16/frames.c.pointertype	2007-08-25 11:20:29.000000000 +0000
+++ xmakemol-5.16/frames.c	2024-01-30 15:34:46.934021294 +0000
@@ -106,7 +106,7 @@ make_frame_dlg(Widget parent)
   Widget *kids;
 #endif
 
-  XmString label = "";
+  XmString label = XmStringCreateSimple("");
 
   if (! frames_dialog) {