diff --git a/packages/firebase_core/firebase_core_web/lib/src/interop/utils/utils.dart b/packages/firebase_core/firebase_core_web/lib/src/interop/utils/utils.dart
index 18ae1d5eaab7..d90fbcf91e8e 100644
--- a/packages/firebase_core/firebase_core_web/lib/src/interop/utils/utils.dart
+++ b/packages/firebase_core/firebase_core_web/lib/src/interop/utils/utils.dart
@@ -67,6 +67,9 @@ dynamic jsify(
   Object? Function(Object? object)? customJsify,
 ]) {
   if (_isBasicType(dartObject)) {
+    if (dartObject == null) {
+      return null;
+    }
     return dartObject;
   }