diff --git a/packages/reflection/src/TsMorphMetadataProvider.ts b/packages/reflection/src/TsMorphMetadataProvider.ts
index 8e83eb662605..9f483fc490d9 100644
--- a/packages/reflection/src/TsMorphMetadataProvider.ts
+++ b/packages/reflection/src/TsMorphMetadataProvider.ts
@@ -95,13 +95,14 @@ export class TsMorphMetadataProvider extends MetadataProvider {
 
     const properties = cls.getInstanceProperties();
     const property = properties.find(v => v.getName() === prop.name) as PropertyDeclaration;
-    const tsType = property.getType();
 
     /* istanbul ignore next */
     if (!property) {
       return { type: prop.type, optional: prop.nullable };
     }
 
+    const tsType = property.getType();
+
     if (tsType.isEnum()) {
       prop.enum = true;
     }
diff --git a/tests/features/reflection/entities/Author.ts b/tests/features/reflection/entities/Author.ts
index 2fb24e933d51..d9a373ce5282 100644
--- a/tests/features/reflection/entities/Author.ts
+++ b/tests/features/reflection/entities/Author.ts
@@ -52,4 +52,9 @@ export class Author extends BaseEntity {
     this.foo = 'bar';
   }
 
+  @Property({ name: 'code' })
+  getCode() {
+    return `${this.email} - ${this.name}`;
+  }
+
 }