1 files changed, 1 insertions, 1 deletions
diff --git a/strbuf.h b/strbuf.h
index dc4710adbb..b128ca539a 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -379,7 +379,7 @@ void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
  * blank to the buffer.
  */
 __attribute__((format (printf, 3, 4)))
-void strbuf_commented_addf(struct strbuf *sb, char comment_prefix, const char *fmt, ...);
+void strbuf_commented_addf(struct strbuf *sb, const char *comment_prefix, const char *fmt, ...);
 
 __attribute__((format (printf,2,0)))
 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);