diff --git a/spec/unit/matrixrtc/LivekitTransport.spec.ts b/spec/unit/matrixrtc/LivekitTransport.spec.ts
index 04f04a1357..f10449d1f6 100644
--- a/spec/unit/matrixrtc/LivekitTransport.spec.ts
+++ b/spec/unit/matrixrtc/LivekitTransport.spec.ts
@@ -61,4 +61,15 @@ describe("LivekitFocus", () => {
         expect(isLivekitTransportConfig({ type: "not-livekit", livekit_service_url: "http://test.com" })).toBeFalsy();
         expect(isLivekitTransportConfig({ type: "livekit", other_service_url: "oldest_membership" })).toBeFalsy();
     });
+    it("does not throw with missing fields", () => {
+        expect(() => isLivekitTransport({})).not.toThrow();
+        expect(() => isLivekitTransportConfig({})).not.toThrow();
+        expect(() => isLivekitFocusSelection({})).not.toThrow();
+        expect(() => isLivekitTransport({ wrong: "field" })).not.toThrow();
+        expect(() => isLivekitTransportConfig({ wrong: "field" })).not.toThrow();
+        expect(() => isLivekitFocusSelection({ wrong: "field" })).not.toThrow();
+        expect(() => isLivekitTransport(undefined)).not.toThrow();
+        expect(() => isLivekitTransportConfig(undefined)).not.toThrow();
+        expect(() => isLivekitFocusSelection(undefined)).not.toThrow();
+    });
 });
diff --git a/src/matrixrtc/LivekitTransport.ts b/src/matrixrtc/LivekitTransport.ts
index eda11f554e..cbbd740ad4 100644
--- a/src/matrixrtc/LivekitTransport.ts
+++ b/src/matrixrtc/LivekitTransport.ts
@@ -22,7 +22,11 @@ export interface LivekitTransportConfig extends Transport {
 }
 
 export const isLivekitTransportConfig = (object: any): object is LivekitTransportConfig =>
-    object.type === "livekit" && "livekit_service_url" in object;
+    object &&
+    "type" in object &&
+    object.type === "livekit" &&
+    "livekit_service_url" in object &&
+    typeof object.livekit_service_url === "string";
 
 export interface LivekitTransport extends LivekitTransportConfig {
     livekit_alias: string;
@@ -43,4 +47,8 @@ export interface LivekitFocusSelection extends Transport {
  * @deprecated see LivekitFocusSelection
  */
 export const isLivekitFocusSelection = (object: any): object is LivekitFocusSelection =>
-    object.type === "livekit" && "focus_selection" in object;
+    object &&
+    "type" in object &&
+    object.type === "livekit" &&
+    "focus_selection" in object &&
+    typeof object.focus_selection === "string";