diff --git a/src/services/OpenAPIParser.ts b/src/services/OpenAPIParser.ts
index e88a0c23..6b36dc2a 100644
--- a/src/services/OpenAPIParser.ts
+++ b/src/services/OpenAPIParser.ts
@@ -273,17 +273,11 @@ export class OpenAPIParser {
       if (items !== undefined && !isCircular) {
         const receiverItems =
           typeof receiver.items === 'boolean'
-            ? receiver.items
-              ? {}
-              : { not: {} }
-            : receiver.items
-            ? (Object.assign({}, receiver.items) as OpenAPISchema)
-            : {};
+            ? {}
+            : (Object.assign({}, receiver.items) as OpenAPISchema);
         const subSchemaItems =
           typeof subSchema.items === 'boolean'
-            ? receiver.items
-              ? {}
-              : { not: {} }
+            ? {}
             : (Object.assign({}, subSchema.items) as OpenAPISchema);
         // merge inner properties
         receiver.items = this.mergeAllOf(