1 files changed, 1 insertions, 1 deletions
diff --git a/buf.c b/buf.c
index 8460631..fb3af82 100644
--- a/buf.c
+++ b/buf.c
@@ -25,7 +25,7 @@ void buf_grow(buf_t *b, size_t n) {
 	}
 }
 
-void buf_cat(buf_t *b, char *src, size_t n) {
+void buf_cat(buf_t *b, const char *src, size_t n) {
 	buf_grow(b, n);
 	memcpy(&b->buf[b->sz], src, n);
 	b->sz += n;