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-rw-r--r--lisp/image.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/image.el b/lisp/image.el
index 4969f8a4762..7dfa0d4a327 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -208,6 +208,7 @@ compatibility with versions of Emacs that lack the variable
(defun image-jpeg-p (data)
"Value is non-nil if DATA, a string, consists of JFIF image data.
We accept the tag Exif because that is the same format."
+ (setq data (string-to-unibyte data))
(when (string-match "\\`\xff\xd8" data)
(catch 'jfif
(let ((len (length data)) (i 2))