1 files changed, 1 insertions, 1 deletions

diff --git a/strbuf.c b/strbuf.c
index 4aed75265e..7767170db3 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -67,7 +67,7 @@ void strbuf_rtrim(struct strbuf *sb)
 	sb->buf[sb->len] = '\0';
 }
 
-int strbuf_cmp(struct strbuf *a, struct strbuf *b)
+int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
 {
 	int cmp;
 	if (a->len < b->len) {