diff --git a/builtin/log.c b/builtin/log.c
index 54f24e2088..a8249d3c01 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -108,9 +108,9 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 			     PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN |
 			     PARSE_OPT_KEEP_DASHDASH);
 
-	argc = setup_revisions(argc, argv, rev, opt);
 	if (quiet)
 		rev->diffopt.output_format |= DIFF_FORMAT_NO_OUTPUT;
+	argc = setup_revisions(argc, argv, rev, opt);
 
 	/* Any arguments at this point are not recognized */
 	if (argc > 1)
diff --git a/t/t7007-show.sh b/t/t7007-show.sh
index a40cd3630c..e41fa00b80 100755
--- a/t/t7007-show.sh
+++ b/t/t7007-show.sh
@@ -108,4 +108,16 @@ test_expect_success 'showing range' '
 	test_cmp expect actual.filtered
 '
 
+test_expect_success '-s suppresses diff' '
+	echo main3 >expect &&
+	git show -s --format=%s main3 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '--quiet suppresses diff' '
+	echo main3 >expect &&
+	git show --quiet --format=%s main3 >actual &&
+	test_cmp expect actual
+'
+
 test_done