diff --git a/offapi/com/sun/star/sheet/FormulaLanguage.idl b/offapi/com/sun/star/sheet/FormulaLanguage.idl
index 658273c524ac..f642d87e094d 100644
--- a/offapi/com/sun/star/sheet/FormulaLanguage.idl
+++ b/offapi/com/sun/star/sheet/FormulaLanguage.idl
@@ -60,6 +60,10 @@ constants FormulaLanguage
      */
     const long NATIVE   = 3;
 
+    /** Function names and operators as used in the English version of
+        Excel.
+     */
+    const long XL_ENGLISH = 4;
 };
 
 //=============================================================================