1 files changed, 1 insertions, 1 deletions
diff --git a/pretty.c b/pretty.c
index b86c5bb90..bad1bfb22 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1062,7 +1062,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 	case 'C':
 		if (starts_with(placeholder + 1, "(auto)")) {
 			c->auto_color = want_color(c->pretty_ctx->color);
-			if (c->auto_color)
+			if (c->auto_color && sb->len)
 				strbuf_addstr(sb, GIT_COLOR_RESET);
 			return 7; /* consumed 7 bytes, "C(auto)" */
 		} else {