diff --git a/src/simularium/RemoteSimulator.ts b/src/simularium/RemoteSimulator.ts
index 087f8d5d..bf18aebb 100644
--- a/src/simularium/RemoteSimulator.ts
+++ b/src/simularium/RemoteSimulator.ts
@@ -7,7 +7,6 @@ import {
     NetMessageEnum,
     MessageEventLike,
     NetMessage,
-    ErrorMessage,
 } from "./WebsocketClient";
 import { ISimulator } from "./ISimulator";
 import { TrajectoryFileInfoV2, VisDataMessage } from "./types";
@@ -143,7 +142,7 @@ export class RemoteSimulator implements ISimulator {
         // TODO: implement callback
     }
 
-    public onErrorMsg(msg: ErrorMessage): void {
+    public onErrorMsg(msg: NetMessage): void {
         this.logger.error(
             "Error message of type ",
             msg.errorCode,
diff --git a/src/simularium/WebsocketClient.ts b/src/simularium/WebsocketClient.ts
index 1a02254c..d3b50cdc 100644
--- a/src/simularium/WebsocketClient.ts
+++ b/src/simularium/WebsocketClient.ts
@@ -6,10 +6,6 @@ export interface NetMessage {
     connId: string;
     msgType: number;
     fileName: string;
-}
-
-export interface ErrorMessage {
-    msgType: number;
     errorCode: number;
     errorMsg: string;
 }