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-rw-r--r--isa/isabelle-system.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/isa/isabelle-system.el b/isa/isabelle-system.el
index 380b0d9d..1c42bd2c 100644
--- a/isa/isabelle-system.el
+++ b/isa/isabelle-system.el
@@ -152,7 +152,7 @@ ISABELLE will always override this setting."
"isabelle")) ; to be really sure
(isabelle-opts (getenv "ISABELLE_OPTIONS"))
(opts (concat
- (if isa-running-isar " -PI" "")
+ (if isa-running-isar " -m PGASCII -PI" "")
(if (and isabelle-opts (not (equal isabelle-opts "")))
(concat " " isabelle-opts) "")))
(logic (or isabelle-chosen-logic