diff --git a/stable/alpine/Dockerfile b/stable/alpine/Dockerfile
index ec66631a..b196651c 100644
--- a/stable/alpine/Dockerfile
+++ b/stable/alpine/Dockerfile
@@ -47,6 +47,7 @@ RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
 		--with-file-aio \
 		--with-http_v2_module \
 		--with-ipv6 \
+		--with-http_sub_module \
 	" \
 	&& addgroup -S nginx \
 	&& adduser -D -S -h /var/cache/nginx -s /sbin/nologin -G nginx nginx \