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-rw-r--r--lisp/tooltip.el2
1 files changed, 2 insertions, 0 deletions
diff --git a/lisp/tooltip.el b/lisp/tooltip.el
index cb668f9cd00..6b78acd0597 100644
--- a/lisp/tooltip.el
+++ b/lisp/tooltip.el
@@ -136,6 +136,8 @@ the last mouse movement event that occurred.")
(defvar tooltip-hide-time nil
"Time when the last tooltip was hidden.")
+(defvar gud-tooltip-mode) ;; Prevent warning.
+
;;; Event accessors
(defun tooltip-event-buffer (event)