diff --git a/internal/servers/webrtc/publisher.js b/internal/servers/webrtc/publisher.js
index bc8a703d..33d0a235 100644
--- a/internal/servers/webrtc/publisher.js
+++ b/internal/servers/webrtc/publisher.js
@@ -304,7 +304,7 @@
             throw new Error(`bad status code ${res.status}`);
           }
 
-          this.sessionUrl = new URL(res.headers.get('location'), window.location.href).toString();
+          this.sessionUrl = new URL(res.headers.get('location'), this.conf.url).toString();
 
           return res.text();
         });
diff --git a/internal/servers/webrtc/reader.js b/internal/servers/webrtc/reader.js
index 8bf45cf6..bdb41f15 100644
--- a/internal/servers/webrtc/reader.js
+++ b/internal/servers/webrtc/reader.js
@@ -402,7 +402,7 @@
             throw new Error(`bad status code ${res.status}`);
           }
 
-          this.sessionUrl = new URL(res.headers.get('location'), window.location.href).toString();
+          this.sessionUrl = new URL(res.headers.get('location'), this.conf.url).toString();
 
           return res.text();
         });