1 files changed, 18 insertions, 17 deletions

diff --git a/lisp/progmodes/c-mode.el b/lisp/progmodes/c-mode.el
index a9aab352c7b..ec4b2c646ab 100644
--- a/lisp/progmodes/c-mode.el
+++ b/lisp/progmodes/c-mode.el
@@ -1271,24 +1271,25 @@ When going forwards, `#elif' is ignored."
                         ;; the regexp matcher.
                         (funcall search-function
                                  "#[ \t]*\\(if\\|elif\\|endif\\)"
-                                 nil t)
-                        (progn
-                          (beginning-of-line)
-                          (looking-at "^[ \t]*#[ \t]*\\(if\\|elif\\|endif\\)")))
-              ;; Update depth according to what we found.
+                                 nil t))
               (beginning-of-line)
-              (cond ((looking-at "[ \t]*#[ \t]*endif")
-                     (setq depth (+ depth increment)))
-                    ((looking-at "[ \t]*#[ \t]*elif")
-                     (if (and forward (= depth 0))
-                         (setq found (point))))
-                    (t (setq depth (- depth increment))))
-              ;; If this line exits a level of conditional, exit inner loop.
-              (if (< depth 0)
-                  (setq found (point)))
-              ;; When searching forward, start from end of line
-              ;; so that we don't find the same line again.
-              (if forward (end-of-line))))
+              ;; Now verify it is really a preproc line.
+              (if (looking-at "^[ \t]*#[ \t]*\\(if\\|elif\\|endif\\)")
+                  (progn
+                    ;; Update depth according to what we found.
+                    (beginning-of-line)
+                    (cond ((looking-at "[ \t]*#[ \t]*endif")
+                           (setq depth (+ depth increment)))
+                          ((looking-at "[ \t]*#[ \t]*elif")
+                           (if (and forward (= depth 0))
+                               (setq found (point))))
+                          (t (setq depth (- depth increment))))
+                    ;; If this line exits a level of conditional, exit inner loop.
+                    (if (< depth 0)
+                        (setq found (point)))
+                    ;; When searching forward, start from end of line
+                    ;; so that we don't find the same line again.
+                    (if forward (end-of-line))))))
           (or found
               (error "No containing preprocessor conditional"))
           (goto-char (setq new found)))