diff --git a/packages/core/src/generators/interface.ts b/packages/core/src/generators/interface.ts
index 907e23752..837a20166 100644
--- a/packages/core/src/generators/interface.ts
+++ b/packages/core/src/generators/interface.ts
@@ -46,7 +46,11 @@ export const generateInterface = ({
     scalar.type === 'object' &&
     !context?.output.override?.useTypeOverInterfaces
   ) {
-    model += `export interface ${name} ${scalar.value}\n`;
+    // If `scalar.value` is 'unknown', replace it with `{}` to avoid type error
+    const blankInterfaceValue =
+      scalar.value === 'unknown' ? '{}' : scalar.value;
+
+    model += `export interface ${name} ${blankInterfaceValue}\n`;
   } else {
     model += `export type ${name} = ${scalar.value};\n`;
   }
diff --git a/packages/core/src/getters/object.ts b/packages/core/src/getters/object.ts
index cc0ba6389..ea4d2cb73 100644
--- a/packages/core/src/getters/object.ts
+++ b/packages/core/src/getters/object.ts
@@ -202,16 +202,10 @@ export const getObject = ({
     };
   }
 
-  const useTypeOverInterfaces = context?.output.override?.useTypeOverInterfaces;
-  const blankValue =
-    item.type === 'object'
-      ? '{ [key: string]: any }'
-      : useTypeOverInterfaces
-        ? 'unknown'
-        : '{}';
-
   return {
-    value: blankValue + nullable,
+    value:
+      (item.type === 'object' ? '{ [key: string]: any }' : 'unknown') +
+      nullable,
     imports: [],
     schemas: [],
     isEnum: false,
diff --git a/tests/specifications/regressions.yaml b/tests/specifications/regressions.yaml
index afe264f47..963cdbf5c 100644
--- a/tests/specifications/regressions.yaml
+++ b/tests/specifications/regressions.yaml
@@ -19,6 +19,11 @@ components:
             items:
               type: string
               nullable: true
+    BlankSchema: {}
+    NotDifinedType:
+      properties:
+        id:
+          description: not defined type schema
 paths:
   /endpointA:
     get: