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-rw-r--r--isar/isabelle-system.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/isar/isabelle-system.el b/isar/isabelle-system.el
index c58b69e3..a45e3470 100644
--- a/isar/isabelle-system.el
+++ b/isar/isabelle-system.el
@@ -22,7 +22,9 @@
(require 'proof-menu)
(require 'proof-syntax)
(proof-ready-for-assistant 'isar) ; compile for isar
- (defvar proof-assistant-menu nil))
+ (defvar proof-assistant-menu nil))
+
+(declare-function mapcan "cl-extra") ; spurious bytecomp warning
;; The isabelle custom group won't have been defined yet.