diff --git a/compiler/fppu.pas b/compiler/fppu.pas
index d9036f6a65..e93b2a3dde 100644
--- a/compiler/fppu.pas
+++ b/compiler/fppu.pas
@@ -1906,7 +1906,7 @@ var
          indirect_crc:=ppufile.indirect_crc;
 
          { end of implementation, to generate a correct ppufile
-           for ppudump when using INTFPPU define }
+           for ppudump when using DEBUG_GENERATE_INTERFACE_PPU define }
          ppufile.writeentry(ibendimplementation);
 
 {$ifdef Test_Double_checksum_write}
diff --git a/compiler/ppu.pas b/compiler/ppu.pas
index bf1eceb4cd..41c3e48509 100644
--- a/compiler/ppu.pas
+++ b/compiler/ppu.pas
@@ -30,7 +30,7 @@ interface
 
 { Also write the ppu if only crc if done, this can be used with ppudump to
   see the differences between the intf and implementation }
-{ define INTFPPU}
+{ define DEBUG_GENERATE_INTERFACE_PPU}
 
 {$ifdef Test_Double_checksum}
 const
@@ -343,7 +343,7 @@ end;
 
 function tppufile.createfile:boolean;
 begin
-{$ifdef INTFPPU}
+{$ifdef DEBUG_GENERATE_INTERFACE_PPU}
   if crc_only then
    begin
      fname:=fname+'.intf';