diff --git a/remote-curl.c b/remote-curl.c
index c0b98cc..7b19ebb 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -102,7 +102,8 @@
 	free_discovery(last);
 
 	strbuf_addf(&buffer, "%sinfo/refs", url);
-	if (!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) {
+	if ((!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) &&
+	     git_env_bool("GIT_SMART_HTTP", 1)) {
 		maybe_smart = 1;
 		if (!strchr(url, '?'))
 			strbuf_addch(&buffer, '?');
diff --git a/t/t5551-http-fetch.sh b/t/t5551-http-fetch.sh
index 2db5c35..8427943 100755
--- a/t/t5551-http-fetch.sh
+++ b/t/t5551-http-fetch.sh
@@ -129,6 +129,18 @@
 	test_cmp expect actual
 '
 
+test_expect_success 'disable dumb http on server' '
+	git --git-dir="$HTTPD_DOCUMENT_ROOT_PATH/repo.git" \
+		config http.getanyfile false
+'
+
+test_expect_success 'GIT_SMART_HTTP can disable smart http' '
+	(GIT_SMART_HTTP=0 &&
+	 export GIT_SMART_HTTP &&
+	 cd clone &&
+	 test_must_fail git fetch)
+'
+
 test -n "$GIT_TEST_LONG" && test_set_prereq EXPENSIVE
 
 test_expect_success EXPENSIVE 'create 50,000 tags in the repo' '