diff --git a/compiler/options.pas b/compiler/options.pas
index 1d68be9592..fd3b3cdd8e 100644
--- a/compiler/options.pas
+++ b/compiler/options.pas
@@ -3389,7 +3389,6 @@ begin
 {$ifdef i8086}
   def_system_macro('CPU86');  { Borland compatibility }
   def_system_macro('CPU87');  { Borland compatibility }
-  def_system_macro('CPU8086');
   def_system_macro('CPUI8086');
   def_system_macro('CPU16');
   def_system_macro('FPC_HAS_TYPE_EXTENDED');