diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index 1261ec4dd0..973b50d417 100644
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -132,10 +132,12 @@ void shortlog_add_commit(struct shortlog *log, struct commit *commit)
 		goto out;
 	}
 
-	if (log->user_format)
-		pretty_print_commit(&ctx, commit, &oneline);
-	else
-		format_commit_message(commit, "%s", &oneline, &ctx);
+	if (!log->summary) {
+		if (log->user_format)
+			pretty_print_commit(&ctx, commit, &oneline);
+		else
+			format_commit_message(commit, "%s", &oneline, &ctx);
+	}
 
 	insert_one_record(log, author.buf, oneline.len ? oneline.buf : "<none>");