diff --git a/compiler/avr/navradd.pas b/compiler/avr/navradd.pas
index 3cf3270466..25481b5684 100644
--- a/compiler/avr/navradd.pas
+++ b/compiler/avr/navradd.pas
@@ -220,7 +220,7 @@ interface
     function tavraddnode.pass_1 : tnode;
       begin
         result:=inherited pass_1;
-{
+{$ifdef dummy}
         if not(assigned(result)) then
           begin
             unsigned:=not(is_signed(left.resultdef)) or
@@ -240,7 +240,7 @@ interface
              is_dynamic_array(left.resultdef)
            ) then
           expectloc:=LOC_FLAGS;
-}
+{$endif dummy}
       end;
 
 
diff --git a/compiler/avr/navrmat.pas b/compiler/avr/navrmat.pas
index b724b76383..802e3d0443 100644
--- a/compiler/avr/navrmat.pas
+++ b/compiler/avr/navrmat.pas
@@ -165,7 +165,7 @@ implementation
         secondpass(right);
         location_copy(location,left.location);
 
-{
+{$ifdef dummy}
         { put numerator in register }
         size:=def_cgsize(left.resultdef);
         hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,
@@ -201,7 +201,7 @@ implementation
         {  simple comparison with 0)                                             }
         if is_signed(right.resultdef) then
           cg.g_overflowcheck(current_asmdata.CurrAsmList,location,resultdef);
-}
+{$endif dummy}
       end;
 
 {*****************************************************************************