diff --git a/ansible/files/prosody.cfg.lua b/ansible/files/prosody.cfg.lua
index 5155503..6291913 100644
--- a/ansible/files/prosody.cfg.lua
+++ b/ansible/files/prosody.cfg.lua
@@ -223,6 +223,7 @@ Component ("share."..DOMAIN) "http_upload"
 	-- For backwards compat, allow HTTP upload on the base domain
 	if ENV_SNIKKET_TWEAK_SHARE_DOMAIN ~= "1" then
 		http_host = "share."..DOMAIN
+		http_external_url = "https://share."..DOMAIN.."/"
 	end
 	http_upload_file_size_limit = 1024 * 1024 * 10 -- 10MB