diff --git a/python4lazarus/Definition.Inc b/python4lazarus/Definition.Inc
index d402c76..0d4fcf0 100644
--- a/python4lazarus/Definition.Inc
+++ b/python4lazarus/Definition.Inc
@@ -207,6 +207,7 @@
 
   {$IFDEF CPU64}
     {$DEFINE CPU64BITS}
+    {$DEFINE CPUX64}
   {$ENDIF CPU64}
 
   {$IFDEF CPU86}