diff --git a/.changeset/serious-goats-report.md b/.changeset/serious-goats-report.md
new file mode 100644
index 00000000000..9c1d7f4aef0
--- /dev/null
+++ b/.changeset/serious-goats-report.md
@@ -0,0 +1,5 @@
+---
+"@smithy/util-stream": patch
+---
+
+add bundler metadata for ChecksumStream file
diff --git a/packages/util-stream/package.json b/packages/util-stream/package.json
index 545c9f581f8..9b337e9865c 100644
--- a/packages/util-stream/package.json
+++ b/packages/util-stream/package.json
@@ -56,6 +56,7 @@
   ],
   "browser": {
     "./dist-es/checksum/createChecksumStream": "./dist-es/checksum/createChecksumStream.browser",
+    "./dist-es/checksum/ChecksumStream": "./dist-es/checksum/ChecksumStream.browser",
     "./dist-es/getAwsChunkedEncodingStream": "./dist-es/getAwsChunkedEncodingStream.browser",
     "./dist-es/headStream": "./dist-es/headStream.browser",
     "./dist-es/sdk-stream-mixin": "./dist-es/sdk-stream-mixin.browser",
@@ -63,11 +64,13 @@
   },
   "react-native": {
     "./dist-es/checksum/createChecksumStream": "./dist-es/checksum/createChecksumStream.browser",
+    "./dist-es/checksum/ChecksumStream": "./dist-es/checksum/ChecksumStream.browser",
     "./dist-es/getAwsChunkedEncodingStream": "./dist-es/getAwsChunkedEncodingStream.browser",
     "./dist-es/sdk-stream-mixin": "./dist-es/sdk-stream-mixin.browser",
     "./dist-es/headStream": "./dist-es/headStream.browser",
     "./dist-es/splitStream": "./dist-es/splitStream.browser",
     "./dist-cjs/checksum/createChecksumStream": "./dist-cjs/checksum/createChecksumStream.browser",
+    "./dist-cjs/checksum/ChecksumStream": "./dist-cjs/checksum/ChecksumStream.browser",
     "./dist-cjs/getAwsChunkedEncodingStream": "./dist-cjs/getAwsChunkedEncodingStream.browser",
     "./dist-cjs/sdk-stream-mixin": "./dist-cjs/sdk-stream-mixin.browser",
     "./dist-cjs/headStream": "./dist-cjs/headStream.browser",