diff --git a/shell/platform/fuchsia/flutter/pointer_injector_delegate.cc b/shell/platform/fuchsia/flutter/pointer_injector_delegate.cc
index 5be5b695a3f5c..0119f28e8a2b0 100644
--- a/shell/platform/fuchsia/flutter/pointer_injector_delegate.cc
+++ b/shell/platform/fuchsia/flutter/pointer_injector_delegate.cc
@@ -129,7 +129,7 @@ bool PointerInjectorDelegate::HandlePlatformMessage(
     }
 
     auto timestamp = args.FindMember("timestamp");
-    if (!timestamp->value.IsInt()) {
+    if (!timestamp->value.IsInt() && !timestamp->value.IsUint64()) {
       FML_LOG(ERROR) << "Argument 'timestamp' is not a int";
       return false;
     }