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-rw-r--r--lisp/progmodes/idlwave.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/progmodes/idlwave.el b/lisp/progmodes/idlwave.el
index 2601c2e1653..7bc2b60b0e6 100644
--- a/lisp/progmodes/idlwave.el
+++ b/lisp/progmodes/idlwave.el
@@ -314,7 +314,7 @@ split then a terminal beep and warning are issued."
expression will not be changed. Note that the indentation of a comment
at the beginning of a line is never changed."
:group 'idlwave-code-formatting
- :type 'string)
+ :type 'regexp)
(defcustom idlwave-begin-line-comment nil
"A comment anchored at the beginning of line.