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-rw-r--r--lisp/image/wallpaper.el2
1 files changed, 2 insertions, 0 deletions
diff --git a/lisp/image/wallpaper.el b/lisp/image/wallpaper.el
index d024d6238cb..fe6882a5880 100644
--- a/lisp/image/wallpaper.el
+++ b/lisp/image/wallpaper.el
@@ -254,6 +254,8 @@ On Haiku, no external command is needed, so the value of
((featurep 'haiku)
(haiku-set-wallpaper file))
(t
+ (unless wallpaper-command
+ (error "Couldn't find a command to set the wallpaper with"))
(let* ((fmt-spec `((?f . ,(expand-file-name file))
(?h . ,(wallpaper--get-height-or-width
"height"