diff --git a/src/proxy/middleware/response/streaming/sse-stream-adapter.ts b/src/proxy/middleware/response/streaming/sse-stream-adapter.ts
index c5bae2f..934c761 100644
--- a/src/proxy/middleware/response/streaming/sse-stream-adapter.ts
+++ b/src/proxy/middleware/response/streaming/sse-stream-adapter.ts
@@ -55,9 +55,11 @@ export class SSEStreamAdapter extends Transform {
       // noinspection FallThroughInSwitchStatementJS
       case "exception":
       case "error":
-        const type = exceptionType || errorCode || "UnknownError";
+        const type = String(
+          exceptionType || errorCode || "UnknownError"
+        ).toLowerCase();
         switch (type) {
-          case "ThrottlingException":
+          case "throttlingexception":
             this.log.warn(
               { message, type },
               "AWS request throttled after streaming has already started; retrying"