1 files changed, 6 insertions, 0 deletions

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index be718135f99..20673866bc4 100644
--- a/lisp/progmodes/make-mode.el
+++ b/lisp/progmodes/make-mode.el
@@ -1304,6 +1304,12 @@ Fill comments, backslashed lines, and variable definitions specially."
         (save-restriction
           (narrow-to-region beginning end)
           (makefile-backslash-region (point-min) (point-max) t)
+          ;; Backslashed newlines are marked as punctuation, so when
+          ;; fill-delete-newlines turns the LF into SPC, we end up with spaces
+          ;; which back-to-indentation (called via fill-newline ->
+          ;; fill-indent-to-left-margin -> indent-line-to) thinks are real code
+          ;; (bug#13179).
+          (remove-text-properties (point-min) (point-max) '(syntax-table))
           (let ((fill-paragraph-function nil)
                 ;; Adjust fill-column to allow space for the backslash.
                 (fill-column (- fill-column 1)))