diff --git a/rtl/inc/objpash.inc b/rtl/inc/objpash.inc
index c03a0f79f5..9227d01e89 100644
--- a/rtl/inc/objpash.inc
+++ b/rtl/inc/objpash.inc
@@ -31,7 +31,7 @@
 
     const
        vmtInstanceSize         = 0;
-       vmtParent               = sizeof(ptruint)*2;
+       vmtParent               = sizeof(SizeInt)*2;
        { These were negative value's, but are now positive, else classes
          couldn't be used with shared linking which copies only all data from
          the .global directive and not the data before the directive (PFV) }