diff --git a/src/lib/secret-sauce/p2pMessage.ts b/src/lib/secret-sauce/p2pMessage.ts
index bd574442d..be376c8c7 100644
--- a/src/lib/secret-sauce/p2pMessage.ts
+++ b/src/lib/secret-sauce/p2pMessage.ts
@@ -47,7 +47,7 @@ export interface P2PPayloadType {
 }
 
 type P2pSsrcGroup = {
-  semantics: string;
+  semantics?: string;
   ssrcs: number[];
 };
 
diff --git a/src/lib/secret-sauce/secretsauce.ts b/src/lib/secret-sauce/secretsauce.ts
index 2a9360c6f..727f6f409 100644
--- a/src/lib/secret-sauce/secretsauce.ts
+++ b/src/lib/secret-sauce/secretsauce.ts
@@ -472,7 +472,6 @@ export async function handleUpdateGroupCallParticipants(updatedParticipants: Gro
         endpoint: `audio${participant.source}`,
         isVideo: false,
         sourceGroups: [{
-          semantics: 'FID',
           sources: [participant.source],
         }],
         mid: state!.lastMid.toString()
@@ -757,7 +756,6 @@ function initializeConnection(
       userId: '',
       sourceGroups: [
         {
-          semantics: 'FID',
           sources: [sdp.ssrc || 0],
         },
       ],
diff --git a/src/lib/secret-sauce/types.ts b/src/lib/secret-sauce/types.ts
index e5389a448..72308ec5c 100644
--- a/src/lib/secret-sauce/types.ts
+++ b/src/lib/secret-sauce/types.ts
@@ -43,7 +43,7 @@ export type Fingerprint = {
 };
 
 export type SsrcGroup = {
-  semantics: string;
+  semantics?: string;
   sources: number[];
 };