diff --git a/packages/firestore/lib/utils/index.js b/packages/firestore/lib/utils/index.js
index ee1f660c..7c7a071b 100644
--- a/packages/firestore/lib/utils/index.js
+++ b/packages/firestore/lib/utils/index.js
@@ -192,7 +192,8 @@ export function parseSnapshotArgs(args) {
    * .onSnapshot(SnapshotListenOptions, ...
    */
   if (isObject(args[0]) && !isPartialObserver(args[0])) {
-    snapshotListenOptions.includeMetadataChanges = Boolean(args[0].includeMetadataChanges);
+    snapshotListenOptions.includeMetadataChanges =
+      args[0].includeMetadataChanges == null ? false : args[0].includeMetadataChanges;
     if (isFunction(args[1])) {
       /**
        * .onSnapshot(SnapshotListenOptions, Function);