diff --git a/mach/sparc/mach_params b/mach/sparc/mach_params
index 00b778424..bbbc57989 100644
--- a/mach/sparc/mach_params
+++ b/mach/sparc/mach_params
@@ -2,4 +2,4 @@ MACH=sparc
 SUF=o
 ASAR=ar
 RANLIB=ranlib
-MACHFL=-O -DUFS
+MACHFL=-O -DNFS