diff --git a/Makefile b/Makefile
index c7b7f9b..db284da 100644
--- a/Makefile
+++ b/Makefile
@@ -111,6 +111,9 @@ create-target-docker:
 	cp -lf target/armv7-unknown-linux-musleabihf/release-github/rqbit target/docker/linux/arm/v7/rqbit && \
 	cp docker/Dockerfile target/Docker
 
+@PHONE: docker-build-prereqs
+docker-build-prereqs: release-linux-aarch64 release-linux-x86_64 release-linux-armv7
+
 @PHONY: docker-build
 docker-build: create-target-docker
 	docker build \
diff --git a/crates/upnp-serve/src/ssdp.rs b/crates/upnp-serve/src/ssdp.rs
index c88f737..95197af 100644
--- a/crates/upnp-serve/src/ssdp.rs
+++ b/crates/upnp-serve/src/ssdp.rs
@@ -113,7 +113,6 @@ impl SsdpRunner {
         #[cfg(not(target_os = "windows"))]
         sock.set_reuse_port(true)
             .context("error setting SO_REUSEPORT")?;
-        #[cfg(target_os = "windows")]
         sock.set_reuse_address(true)
             .context("error setting SO_REUSEADDR")?;
 
@@ -153,10 +152,9 @@ USN: {usn}::{kind}\r
         )
     }
 
-    fn generate_ssdp_discover_response(&self) -> String {
+    fn generate_ssdp_discover_response(&self, st: &str) -> String {
         let location = &self.opts.description_http_location;
         let usn = &self.opts.usn;
-        let media_server = UPNP_KIND_MEDIASERVER;
         let server = &self.opts.server_string;
         format!(
             "HTTP/1.1 200 OK\r
@@ -164,8 +162,8 @@ Cache-Control: max-age=75\r
 Ext: \r
 Location: {location}\r
 Server: {server}\r
-St: {media_server}\r
-Usn: {usn}::{media_server}\r
+St: {st}\r
+Usn: {usn}::{st}\r
 Content-Length: 0\r\n\r\n"
         )
     }
@@ -214,12 +212,14 @@ Content-Length: 0\r\n\r\n"
             return Ok(());
         }
 
-        let response = self.generate_ssdp_discover_response();
-        trace!(content = response, ?addr, "sending SSDP discover response");
-        self.socket
-            .send_to(response.as_bytes(), addr)
-            .await
-            .context("error sending")?;
+        if let Ok(st) = std::str::from_utf8(msg.st) {
+            let response = self.generate_ssdp_discover_response(st);
+            trace!(content = response, ?addr, "sending SSDP discover response");
+            self.socket
+                .send_to(response.as_bytes(), addr)
+                .await
+                .context("error sending")?;
+        }
 
         Ok(())
     }