diff --git a/src/__tests__/validation/__snapshots__/pipelineFunctions.test.ts.snap b/src/__tests__/validation/__snapshots__/pipelineFunctions.test.ts.snap
index 6b910f31..5a9c6ec8 100644
--- a/src/__tests__/validation/__snapshots__/pipelineFunctions.test.ts.snap
+++ b/src/__tests__/validation/__snapshots__/pipelineFunctions.test.ts.snap
@@ -15,7 +15,7 @@ exports[`Basic Invalid should validate: Invalid embedded datasource 1`] = `
 `;
 
 exports[`Basic Invalid should validate: Invalid inline datasource 1`] = `
-"/pipelineFunctions/function1: must be object
+"/pipelineFunctions/function1: must be a string or an object
 /pipelineFunctions: contains invalid pipeline function definitions"
 `;
 
diff --git a/src/__tests__/validation/pipelineFunctions.test.ts b/src/__tests__/validation/pipelineFunctions.test.ts
index 3f113d34..7341e10c 100644
--- a/src/__tests__/validation/pipelineFunctions.test.ts
+++ b/src/__tests__/validation/pipelineFunctions.test.ts
@@ -49,6 +49,7 @@ describe('Basic', () => {
                 request: 'request.vtl',
                 response: 'response.vtl',
               },
+              function4: 'ds1',
             },
           ] as Record<string, FunctionConfigInput>[],
         },
diff --git a/src/resources/SyncConfig.ts b/src/resources/SyncConfig.ts
index 172c465c..893d2485 100644
--- a/src/resources/SyncConfig.ts
+++ b/src/resources/SyncConfig.ts
@@ -1,4 +1,3 @@
-import { O } from 'ts-toolbelt';
 import { PipelineFunctionConfig, ResolverConfig } from '../types/plugin';
 import { Api } from './Api';
 
diff --git a/src/validation.ts b/src/validation.ts
index b104781c..ec12c871 100644
--- a/src/validation.ts
+++ b/src/validation.ts
@@ -802,18 +802,12 @@ export const appSyncSchema = {
     pipelineFunctions: {
       oneOf: [
         {
-          type: 'object',
-          additionalProperties: {
-            $ref: '#/definitions/pipelineFunctionConfig',
-          },
+          $ref: '#/definitions/pipelineFunctionConfigMap',
         },
         {
           type: 'array',
           items: {
-            type: 'object',
-            additionalProperties: {
-              $ref: '#/definitions/pipelineFunctionConfig',
-            },
+            $ref: '#/definitions/pipelineFunctionConfigMap',
           },
         },
       ],