diff --git a/src/RTCPeerConnection.ts b/src/RTCPeerConnection.ts
index 9cfe1a540..4315e2f3f 100644
--- a/src/RTCPeerConnection.ts
+++ b/src/RTCPeerConnection.ts
@@ -326,6 +326,10 @@ export default class RTCPeerConnection extends EventTarget<RTCPeerConnectionEven
     }
 
     async addIceCandidate(candidate): Promise<void> {
+        if (this.connectionState === 'closed') {
+            throw new Error('Peer Connection is closed');
+        }
+
         log.debug(`${this._pcId} addIceCandidate`);
 
         if (!candidate || !candidate.candidate) {