diff --git a/lib/graphql/introspection/input_value_type.rb b/lib/graphql/introspection/input_value_type.rb
index 33e544ffe8..8a07b9932e 100644
--- a/lib/graphql/introspection/input_value_type.rb
+++ b/lib/graphql/introspection/input_value_type.rb
@@ -19,7 +19,7 @@ def is_deprecated
 
       def default_value
         if @object.default_value?
-          value = @object.default_value
+          value = @object.default_value(@context)
           if value.nil?
             'null'
           else
diff --git a/lib/graphql/schema/argument.rb b/lib/graphql/schema/argument.rb
index 07098d5fd3..036ce2396f 100644
--- a/lib/graphql/schema/argument.rb
+++ b/lib/graphql/schema/argument.rb
@@ -87,7 +87,15 @@ def initialize(arg_name = nil, type_expr = nil, desc = nil, required:, type: nil
       end
 
       # @return [Object] the value used when the client doesn't provide a value for this argument
-      attr_reader :default_value
+      def default_value(context = GraphQL::Query::NullContext)
+        return @default_value if @default_value == NO_DEFAULT
+
+        coerced_value = @default_value.nil? ? nil : type.coerce_result(@default_value, context)
+        validation = type.validate_input(coerced_value, context)
+        raise validation.problems.first unless validation.valid?
+
+        @default_value
+      end
 
       # @return [Boolean] True if this argument has a default value
       def default_value?
@@ -250,7 +258,7 @@ def coerce_into_values(parent_object, values, context, argument_values)
           value = values[arg_key]
         elsif default_value?
           has_value = true
-          value = default_value
+          value = default_value(context)
           default_used = true
         end
 
diff --git a/lib/graphql/schema/resolver.rb b/lib/graphql/schema/resolver.rb
index a7aa8a25c6..ddbb2662ea 100644
--- a/lib/graphql/schema/resolver.rb
+++ b/lib/graphql/schema/resolver.rb
@@ -148,7 +148,7 @@ def ready?(**args)
       def authorized?(**inputs)
         self.class.arguments.each_value do |argument|
           arg_keyword = argument.keyword
-          if inputs.key?(arg_keyword) && !(arg_value = inputs[arg_keyword]).nil? && (arg_value != argument.default_value)
+          if inputs.key?(arg_keyword) && !(arg_value = inputs[arg_keyword]).nil? && (arg_value != argument.default_value(context))
             arg_auth, err = argument.authorized?(self, arg_value, context)
             if !arg_auth
               return arg_auth, err
diff --git a/spec/graphql/schema/argument_spec.rb b/spec/graphql/schema/argument_spec.rb
index bfc823fff9..730d9989b3 100644
--- a/spec/graphql/schema/argument_spec.rb
+++ b/spec/graphql/schema/argument_spec.rb
@@ -211,6 +211,13 @@ def self.object_from_id(id, ctx)
     end
   end
 
+  it 'validates the type of the default value' do
+    arg = GraphQL::Schema::Argument.new("my_arg", GraphQL::Types::Int, required: true, owner: nil, default_value: :some_symbol)
+    assert_raises(StandardError) do
+      arg.default_value
+    end
+  end
+
   describe 'loads' do
     it "loads input object arguments" do
       query_str = <<-GRAPHQL