2 files changed, 7 insertions, 7 deletions
diff --git a/src/bun.js/builtins/ts/ReadableByteStreamInternals.ts b/src/bun.js/builtins/ts/ReadableByteStreamInternals.ts
index f44c385b4..b2c36922c 100644
--- a/src/bun.js/builtins/ts/ReadableByteStreamInternals.ts
+++ b/src/bun.js/builtins/ts/ReadableByteStreamInternals.ts
@@ -372,7 +372,7 @@ export function readableByteStreamControllerRespondWithNewView(controller, view)
 export function readableByteStreamControllerRespond(controller, bytesWritten) {
   bytesWritten = $toNumber(bytesWritten);
 
-  if (isNaN(bytesWritten) || bytesWritten === Infinity || bytesWritten < 0)
+  if (bytesWritten !== bytesWritten || bytesWritten === Infinity || bytesWritten < 0)
     throw new RangeError("bytesWritten has an incorrect value");
 
   $assert($getByIdDirectPrivate(controller, "pendingPullIntos").isNotEmpty());
diff --git a/src/bun.js/builtins/ts/StreamInternals.ts b/src/bun.js/builtins/ts/StreamInternals.ts
index b42dc2f57..a2e19fdf7 100644
--- a/src/bun.js/builtins/ts/StreamInternals.ts
+++ b/src/bun.js/builtins/ts/StreamInternals.ts
@@ -79,12 +79,12 @@ export function promiseInvokeOrFallbackOrNoop(object, key1, args1, key2, args2)
 export function validateAndNormalizeQueuingStrategy(size, highWaterMark) {
   if (size !== undefined && typeof size !== "function") throw new TypeError("size parameter must be a function");
 
-  const newHighWaterMark = $toNumber(highWaterMark);
+  highWaterMark = $toNumber(highWaterMark);
 
-  if (isNaN(newHighWaterMark) || newHighWaterMark < 0)
+  if (highWaterMark !== highWaterMark || highWaterMark < 0)
     throw new RangeError("highWaterMark value is negative or not a number");
 
-  return { size: size, highWaterMark: newHighWaterMark };
+  return { size, highWaterMark };
 }
 
 $linkTimeConstant;
@@ -241,10 +241,10 @@ export function extractHighWaterMark(strategy, defaultHWM) {
 
   if (highWaterMark === undefined) return defaultHWM;
 
-  if (isNaN(highWaterMark) || highWaterMark < 0)
-    throw new RangeError("highWaterMark value is negative or not a number");
+  const result = $toNumber(highWaterMark);
+  if (result !== result || result < 0) throw new RangeError("highWaterMark value is negative or not a number");
 
-  return $toNumber(highWaterMark);
+  return result;
 }
 
 export function extractHighWaterMarkFromQueuingStrategyInit(init: { highWaterMark?: number }) {