diff --git a/arg_lut.csv b/arg_lut.csv
index b1436503..d471bc77 100644
--- a/arg_lut.csv
+++ b/arg_lut.csv
@@ -42,7 +42,6 @@
 "vm", 25, 25
 "wd", 26, 26
 "amoop", 31, 27
-"nf", 31, 29
 "simm5", 19, 15
 "zimm5", 19, 15
 "zimm10", 29, 20
diff --git a/rv_v b/rv_v
index c1ff2f0f..13750925 100644
--- a/rv_v
+++ b/rv_v
@@ -4,7 +4,7 @@
 # <opcode> is given by specifying one or more range/value pairs:
 # hi..lo=value or bit=value or arg=value (e.g. 6..2=0x45 10=1 rd=0)
 #
-# <args> is one of vd, vs3, vs1, vs2, vm, nf, wd, simm5, zimm10, zimm11
+# <args> is one of vd, vs3, vs1, vs2, vm, wd, simm5, zimm10, zimm11
 
 # configuration setting
 # https://github.com/riscv/riscv-v-spec/blob/master/vcfg-format.adoc