1 files changed, 2 insertions, 2 deletions
diff --git a/revision.h b/revision.h
index 983ffc0..a1a804b 100644
--- a/revision.h
+++ b/revision.h
@@ -370,8 +370,8 @@ int prepare_revision_walk(struct rev_info *revs);
  */
 struct commit *get_revision(struct rev_info *revs);
 
-char *get_revision_mark(const struct rev_info *revs,
-			const struct commit *commit);
+const char *get_revision_mark(const struct rev_info *revs,
+			      const struct commit *commit);
 void put_revision_mark(const struct rev_info *revs,
 		       const struct commit *commit);