diff -ur mc-4.5.55/gnome/gtkflist.c mc-4.5.55-colin/gnome/gtkflist.c
--- mc-4.5.55/gnome/gtkflist.c	Tue Jul 10 20:18:09 2001
+++ mc-4.5.55-colin/gnome/gtkflist.c	Mon Mar 18 11:07:41 2002
@@ -184,7 +184,7 @@
 	int range, additive;
 
 	range = (state & GDK_SHIFT_MASK) != 0;
-	additive = (state & GDK_CONTROL_MASK) != 0;
+	additive = (state & GDK_MOD2_MASK) != 0;
 
 	if (!additive)
 		gtk_clist_unselect_all (GTK_CLIST (flist));
@@ -245,8 +245,8 @@
 				/* Handle selection */
 
 				if ((fe->f.marked
-				     && !(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)))
-				    || ((event->state & GDK_CONTROL_MASK)
+				     && !(event->state & (GDK_MOD2_MASK | GDK_SHIFT_MASK)))
+				    || ((event->state & GDK_MOD2_MASK)
 					&& !(event->state & GDK_SHIFT_MASK))) {
 					flist->dnd_select_pending = TRUE;
 					flist->dnd_select_pending_state = event->state;