diff --git a/sdk/lib/_internal/wasm/lib/double.dart b/sdk/lib/_internal/wasm/lib/double.dart
index 431d65903b5..96b2c092fc5 100644
--- a/sdk/lib/_internal/wasm/lib/double.dart
+++ b/sdk/lib/_internal/wasm/lib/double.dart
@@ -29,7 +29,11 @@ class double {
       [@deprecated double onError(String source)?]) {
     double? result = tryParse(source);
     if (result == null) {
-      throw FormatException('Invalid double $source');
+      if (onError == null) {
+        throw FormatException('Invalid double $source');
+      } else {
+        return onError(source);
+      }
     }
     return result;
   }