diff --git a/debian/changelog b/debian/changelog
index aeb46b61..cd070131 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+livecd-rootfs (2.578.4) UNRELEASED; urgency=medium
+
+  * magic-proxy: Send headers on error (LP: #1829944)
+
+ -- Robert C Jennings <robert.jennings@canonical.com>  Tue, 21 May 2019 19:22:13 -0500
+
 livecd-rootfs (2.578.3) disco; urgency=medium
 
   [ Robert C Jennings ]
diff --git a/magic-proxy b/magic-proxy
index 50481e28..e2d0c28d 100755
--- a/magic-proxy
+++ b/magic-proxy
@@ -843,6 +843,7 @@ class ProxyingHTTPRequestHandler(http.server.BaseHTTPRequestHandler):
         """Return an HTTP error status and a message in the response body."""
         self.send_response(status)
         self.send_header("Content-Type", "text/plain; charset=utf-8")
+        self.end_headers()
         self.wfile.write(message.encode("utf-8"))