diff --git a/components/virtualtreeview-new/branches/4.8/VTConfig.inc b/components/virtualtreeview-new/branches/4.8/VTConfig.inc
index 8508c2bea..f026cb508 100644
--- a/components/virtualtreeview-new/branches/4.8/VTConfig.inc
+++ b/components/virtualtreeview-new/branches/4.8/VTConfig.inc
@@ -44,6 +44,7 @@
 {$ifdef Windows}
   {$define EnableThreadSupport}
 {$endif}
-{$ifdef CPU64}
+
+{$if (FPC_FULLVERSION >= 30100) or defined(CPU64)}
   {$define PACKARRAYPASCAL}
 {$endif}
diff --git a/components/virtualtreeview-new/trunk/VTConfig.inc b/components/virtualtreeview-new/trunk/VTConfig.inc
index 55532dce5..93ad27231 100644
--- a/components/virtualtreeview-new/trunk/VTConfig.inc
+++ b/components/virtualtreeview-new/trunk/VTConfig.inc
@@ -44,7 +44,8 @@
 {$ifdef Windows}
   {$define EnableThreadSupport}
 {$endif}
-{$ifdef CPU64}
+{$if (FPC_FULLVERSION >= 30100) or defined(CPU64)}
   {$define PACKARRAYPASCAL}
 {$endif}
+
 {$define CompilerVersion := 19}