diff --git a/graphql_server/CHANGELOG.md b/graphql_server/CHANGELOG.md
index f6a1d166..b8d17ebc 100644
--- a/graphql_server/CHANGELOG.md
+++ b/graphql_server/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Now that variables are `InputValueContext` descendants, handle them the
 same way as other values in `coerceArgumentValues`. TLDR - Removed
 now-obsolete, variable-specific logic in `coerceArgumentValues`.
+* Pass `argumentName`, not `fieldName`, to type validations.
 
 # 1.0.1
 * Fix a bug where `globalVariables` were not being properly passed
diff --git a/graphql_server/lib/graphql_server.dart b/graphql_server/lib/graphql_server.dart
index 2ff007ff..b8355dae 100644
--- a/graphql_server/lib/graphql_server.dart
+++ b/graphql_server/lib/graphql_server.dart
@@ -416,7 +416,7 @@ class GraphQL {
       } else {
         try {
           var validation = argumentType.validate(
-              fieldName, argumentValue.value.computeValue(variableValues));
+              argumentName, argumentValue.value.computeValue(variableValues));
 
           if (!validation.successful) {
             var errors = <GraphQLExceptionError>[