diff --git a/src/helpers/build-type-metadata.ts b/src/helpers/build-type-metadata.ts
index 637555b..2682774 100644
--- a/src/helpers/build-type-metadata.ts
+++ b/src/helpers/build-type-metadata.ts
@@ -100,7 +100,7 @@ export function buildListType(typeNode: TypeNode, typeName: string) {
 export const KOTLIN_SCALARS = [
   {
     scalarName: "ID",
-    kotlinType: "String",
+    kotlinType: "com.expediagroup.graphql.generator.scalars.ID",
   },
   {
     scalarName: "String",
diff --git a/test/unit/should_support_custom_scalars/expected.kt b/test/unit/should_support_custom_scalars/expected.kt
index 25eb236..0043250 100644
--- a/test/unit/should_support_custom_scalars/expected.kt
+++ b/test/unit/should_support_custom_scalars/expected.kt
@@ -3,6 +3,7 @@ package com.kotlin.generated
 import com.expediagroup.graphql.generator.annotations.*
 
 data class MyScalarType(
+    val idField: com.expediagroup.graphql.generator.scalars.ID? = null,
     val field: URL? = null,
     val field2: URL
 )
diff --git a/test/unit/should_support_custom_scalars/schema.graphql b/test/unit/should_support_custom_scalars/schema.graphql
index 80ae8a4..ae7aaa3 100644
--- a/test/unit/should_support_custom_scalars/schema.graphql
+++ b/test/unit/should_support_custom_scalars/schema.graphql
@@ -1,6 +1,7 @@
 scalar URL
 
 type MyScalarType {
+  idField: ID
   field: URL
   field2: URL!
 }