diff --git a/pl/boot.yap b/pl/boot.yap
index 0f6ec607d..5fe46cce4 100755
--- a/pl/boot.yap
+++ b/pl/boot.yap
@@ -73,7 +73,7 @@ true :- true.
     set_value('$gc',on),
     ('$exit_undefp' -> true ; true),
     prompt1(' ?- '),
-    '$swi_set_prolog_flag'(debug, false)
+    '$swi_set_prolog_flag'(debug, false),
 	% simple trick to find out if this is we are booting from Prolog.
 	% boot from a saved state
 	(