diff --git a/compiler/i386/aoptcpu.pas b/compiler/i386/aoptcpu.pas
index 77d36abc88..f120c04fd6 100644
--- a/compiler/i386/aoptcpu.pas
+++ b/compiler/i386/aoptcpu.pas
@@ -24,7 +24,9 @@ unit aoptcpu;
 
 {$i fpcdefs.inc}
 
-{ $define DEBUG_AOPTCPU}
+{$ifdef EXTDEBUG}
+{$define DEBUG_AOPTCPU}
+{$endif EXTDEBUG}
 
   Interface
 
diff --git a/compiler/x86/aoptx86.pas b/compiler/x86/aoptx86.pas
index 962335e757..17ee900914 100644
--- a/compiler/x86/aoptx86.pas
+++ b/compiler/x86/aoptx86.pas
@@ -23,7 +23,9 @@ unit aoptx86;
 
 {$i fpcdefs.inc}
 
+{$ifdef EXTDEBUG}
 {$define DEBUG_AOPTCPU}
+{$endif EXTDEBUG}
 
   interface