diff --git a/rtl/objpas/sysutils/sysunih.inc b/rtl/objpas/sysutils/sysunih.inc
index 48d0c2bafc..12088f24d5 100644
--- a/rtl/objpas/sysutils/sysunih.inc
+++ b/rtl/objpas/sysutils/sysunih.inc
@@ -18,6 +18,9 @@
     *********************************************************************
 }
 
+type
+  TUnicodeCharArray = array of UnicodeChar;
+
 function Trim(const S: unicodestring): unicodestring;
 function TrimLeft(const S: unicodestring): unicodestring;
 function TrimRight(const S: unicodestring): unicodestring;
diff --git a/rtl/objpas/sysutils/sysutilh.inc b/rtl/objpas/sysutils/sysutilh.inc
index ffdc56f9ca..370471a4a2 100644
--- a/rtl/objpas/sysutils/sysutilh.inc
+++ b/rtl/objpas/sysutils/sysutilh.inc
@@ -98,6 +98,8 @@ type
    PWordarray = ^TWordArray;
    TWordArray = array[0..16383] of Word;
 
+   TBytes = array of Byte;   
+
    { exceptions }
    Exception = class(TObject)
     private