diff --git a/src/client/streamableHttp.ts b/src/client/streamableHttp.ts
index 12714ea44..88e6b2321 100644
--- a/src/client/streamableHttp.ts
+++ b/src/client/streamableHttp.ts
@@ -233,8 +233,7 @@ export class StreamableHTTPClientTransport implements Transport {
 
       this._handleSseStream(response.body, options, true);
     } catch (error) {
-      this.onerror?.(error as Error);
-      throw error;
+      throw error as Error;
     }
   }