diff --git a/sbin/sysinstall/ourcurses.c b/sbin/sysinstall/ourcurses.c
index 7a24ead9d06c..4801fd3341d8 100644
--- a/sbin/sysinstall/ourcurses.c
+++ b/sbin/sysinstall/ourcurses.c
@@ -178,6 +178,6 @@ ShowFile(char *filename, char *header)
 	return;
     }
     dialog_clear();
-    dialog_textbox(header, filename, LINES-1, COLS);
+    dialog_textbox(header, filename, LINES, COLS);
     dialog_clear();
 }