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-rw-r--r--generic/proof-mmm.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/proof-mmm.el b/generic/proof-mmm.el
index 9c9c171a..cee76c62 100644
--- a/generic/proof-mmm.el
+++ b/generic/proof-mmm.el
@@ -45,7 +45,7 @@ on MMM regions for the prover's class."
(progn
(if (proof-ass mmm-enable)
(setq mmm-mode-ext-classes-alist
- (cons (list (proof-ass-sym mode) nil
+ (adjoin (list (proof-ass-sym mode) nil
proof-assistant-symbol)
mmm-mode-ext-classes-alist))
(setq mmm-mode-ext-classes-alist