diff --git a/src/types/base.type.ts b/src/types/base.type.ts
index 746b7fb..6e9ad2d 100644
--- a/src/types/base.type.ts
+++ b/src/types/base.type.ts
@@ -150,7 +150,8 @@ export abstract class BaseType<O = unknown> {
     ): morph.PropertySignatureStructure {
         let fieldName = name;
         if (fieldName.includes("/")) fieldName = `"${fieldName}"`;
-        if (element.canBeNull || element.type === Type.Association) fieldName = `${fieldName}?`;
+        if (element.canBeNull || element.type === Type.Association)
+            fieldName = `${fieldName}?`;
 
         let fieldType = "unknown";
         if (element.enum) {
@@ -161,7 +162,6 @@ export abstract class BaseType<O = unknown> {
             fieldType = this.cdsElementToType(element, types, prefix);
         }
 
-
         return {
             kind: morph.StructureKind.PropertySignature,
             name: fieldName,
@@ -390,6 +390,10 @@ export abstract class BaseType<O = unknown> {
             case Type.LargeBinary:
                 result = "Buffer";
                 break;
+
+            case Type.HanaTinyint:
+                result = "number";
+                break;
         }
 
         return result;
diff --git a/src/utils/cds.types.ts b/src/utils/cds.types.ts
index 7dd9adb..0cdaf67 100644
--- a/src/utils/cds.types.ts
+++ b/src/utils/cds.types.ts
@@ -24,6 +24,7 @@ export enum Type {
     LargeString = "cds.LargeString",
     LargeBinary = "cds.LargeBinary",
     User = "User",
+    HanaTinyint = "cds.hana.TINYINT",
 }
 
 export enum Kind {
diff --git a/test/srv/service.cds b/test/srv/service.cds
index f09e0f5..8c7457d 100644
--- a/test/srv/service.cds
+++ b/test/srv/service.cds
@@ -13,8 +13,9 @@ service CatalogService @(path : '/browse') {
     @readonly
     entity Books            as
         select from my.Books {
-            * ,
-            author.name as author
+            *,
+            author.name as author,
+            virtual 1   as isStockVisible : hana.TINYINT
         }
         excluding {
             createdBy,
@@ -22,15 +23,15 @@ service CatalogService @(path : '/browse') {
         }
 
         actions {
-            action addRating(stars :         Integer);
+            action   addRating(stars : Integer);
             function getViewsCount() returns Integer;
         }
 
-    function getBooks(author : my.Authors:ID) returns array of Books;
-    action unboudAction(simpleParameter : String, arrayParameter : array of arrayParameterType, typedParameter : typedParameterType) returns ActionReturnType;
+    function getBooks(author : my.Authors:ID)                                                                                          returns array of Books;
+    action   unboudAction(simpleParameter : String, arrayParameter : array of arrayParameterType, typedParameter : typedParameterType) returns ActionReturnType;
 
     @requires_ : 'authenticated-user'
-    action submitOrder(book : Books:ID, amount : Integer);
+    action   submitOrder(book : Books:ID, amount : Integer);
 
 
     type arrayParameterType : {