diff --git a/lib/absinthe/schema/notation/sdl_render.ex b/lib/absinthe/schema/notation/sdl_render.ex
index e434fd5c98..db47be1029 100644
--- a/lib/absinthe/schema/notation/sdl_render.ex
+++ b/lib/absinthe/schema/notation/sdl_render.ex
@@ -88,9 +88,10 @@ defmodule Absinthe.Schema.Notation.SDL.Render do
     )
   end
 
+  @adapter Absinthe.Adapter.LanguageConventions
   defp render(%Blueprint.Schema.InputValueDefinition{} = input_value, type_definitions) do
     concat([
-      string(input_value.name),
+      string(@adapter.to_external_name(input_value.name, :argument)),
       ": ",
       render(input_value.type, type_definitions),
       default(input_value.default_value_blueprint)
@@ -98,7 +99,6 @@ defmodule Absinthe.Schema.Notation.SDL.Render do
     |> description(input_value.description)
   end
 
-  @adapter Absinthe.Adapter.LanguageConventions
   defp render(%Blueprint.Schema.FieldDefinition{} = field, type_definitions) do
     concat([
       string(@adapter.to_external_name(field.name, :field)),
diff --git a/test/absinthe/schema/sdl_render_test.exs b/test/absinthe/schema/sdl_render_test.exs
index fdc10c57a8..9dd631dbba 100644
--- a/test/absinthe/schema/sdl_render_test.exs
+++ b/test/absinthe/schema/sdl_render_test.exs
@@ -179,6 +179,7 @@ defmodule SdlRenderTest do
     query do
       field :echo, :string do
         arg :times, :integer, default_value: 10, description: "The number of times"
+        arg :time_interval, :integer
       end
     end
 
@@ -205,6 +206,8 @@ defmodule SdlRenderTest do
 
              type RootQueryType {
                echo(
+                 timeInterval: Int
+
                  "The number of times"
                  times: Int
                ): String