diff --git a/builtin/commit.c b/builtin/commit.c
index 3348aa1..d21d07a 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -124,8 +124,10 @@
 	if (unset)
 		strbuf_setlen(buf, 0);
 	else {
+		if (buf->len)
+			strbuf_addch(buf, '\n');
 		strbuf_addstr(buf, arg);
-		strbuf_addstr(buf, "\n\n");
+		strbuf_complete_line(buf);
 	}
 	return 0;
 }