diff --git a/offapi/com/sun/star/setup/OSType.idl b/offapi/com/sun/star/setup/OSType.idl
index 738ab7e73112..77cf8809d751 100644
--- a/offapi/com/sun/star/setup/OSType.idl
+++ b/offapi/com/sun/star/setup/OSType.idl
@@ -42,6 +42,9 @@ published enum OSType
     // DocMerge: empty anyway
     WIN,
 
+    // DocMerge: empty anyway
+    OS2,
+
     // DocMerge: empty anyway
     MAC,
 
diff --git a/udkapi/com/sun/star/lang/SystemDependent.idl b/udkapi/com/sun/star/lang/SystemDependent.idl
index 378fed5d9ed6..ba563baad953 100644
--- a/udkapi/com/sun/star/lang/SystemDependent.idl
+++ b/udkapi/com/sun/star/lang/SystemDependent.idl
@@ -94,6 +94,11 @@ published constants SystemDependent
 
     //-------------------------------------------------------------------------
 
+    // DocMerge from idl: value com::sun::star::lang::SystemDependent::SYSTEM_OS2
+    /** The called interface method returns a value specified for the <em>OS/2</em> system.
+     */
+    const short SYSTEM_OS2 = 4;
+
     // DocMerge from idl: value com::sun::star::lang::SystemDependent::SYSTEM_MAC
     /** The called interface method returns a value specified for the <em>MAC-OS</em> system.
      */