diff --git a/compiler/cgbase.pas b/compiler/cgbase.pas
index fe763b881d..ebde9dd7e0 100644
--- a/compiler/cgbase.pas
+++ b/compiler/cgbase.pas
@@ -329,7 +329,7 @@ interface
 
        { Invalid register number }
        RS_INVALID    = high(tsuperregister);
-       NR_INVALID    = tregister($fffffffff);
+       NR_INVALID    = tregister($ffffffff);
 
        tcgsize2size : Array[tcgsize] of integer =
         (0,