diff --git a/build/buildsetup/ioreg_sp/io_register_list.csv b/build/buildsetup/ioreg_sp/io_register_list.csv
index d42aa0c..012d79c 100644
--- a/build/buildsetup/ioreg_sp/io_register_list.csv
+++ b/build/buildsetup/ioreg_sp/io_register_list.csv
@@ -216,11 +216,12 @@
 0x500,,SOUNDCNT,16,rw,SND,volatile,E,15,1,MIX_CH3,13,1,MIX_CH1,12,1,ROUT,10,2,LOUT,8,2,VOLUME,0,7,,,,,,,,,,,,
 0x501,,SOUNDCNT_8,8,rw,SND,volatile,E,7,1,MIX_CH3,5,1,MIX_CH1,4,1,ROUT,2,2,LOUT,0,2,,,,,,,,,,,,,,,
 0x500,,SOUNDCNT_VOL,8,rw,SND,volatile,VOLUME,0,7,,,,,,,,,,,,,,,,,,,,,,,,,,,
+0x504,,PWMBIAS,16,rw,SND,volatile,BIAS,0,10,,,,,,,,,,,,,,,,,,,,,,,,,,,
 #キャプチャ nitro p206,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
 0x508,,SNDCAPCNT,16,rw,SND,volatile,CAP1_E,15,1,CAP1_FORMAT,11,1,CAP1_REPEAT,10,1,CAP1_IN,9,1,CAP1_OUT,8,1,CAP0_E,7,1,CAP0_FORMAT,3,1,CAP0_REPEAT,2,1,CAP0_IN,1,1,CAP0_OUT,0,1
 0x508,,SNDCAP0CNT,8,rw,SND,volatile,E,7,1,FORMAT,3,1,REPEAT,2,1,IN,1,1,OUT,0,1,,,,,,,,,,,,,,,
 0x509,,SNDCAP1CNT,8,rw,SND,volatile,E,7,1,FORMAT,3,1,REPEAT,2,1,IN,1,1,OUT,0,1,,,,,,,,,,,,,,,
 0x510,,SNDCAP0DAD,32,w,SND,volatile,DEST,0,27,,,,,,,,,,,,,,,,,,,,,,,,,,,
-0x514,,SNDCAP0LEN,16,rw,SND,volatile,LEN,0,16,,,,,,,,,,,,,,,,,,,,,,,,,,,
+0x514,,SNDCAP0LEN,16,rw,SND,volatile,LEN,0,16
 0x518,,SNDCAP1DAD,32,w,SND,volatile,DEST,0,27
 0x51c,,SNDCAP1LEN,16,rw,SND,volatile,LEN,0,16
diff --git a/build/buildtools/modulerules.cctype.CW b/build/buildtools/modulerules.cctype.CW
index 2a17975..aa1a486 100644
--- a/build/buildtools/modulerules.cctype.CW
+++ b/build/buildtools/modulerules.cctype.CW
@@ -438,7 +438,7 @@ endif
 
 # .a
 ifndef	USE_MY_RULE_A
-$(LIBDIR)/$(TARGET_LIB): $(OBJS)
+$(LIBDIR)/$(TARGET_LIB): $(OBJS) $(MAKEFILE)
 	$(AR) $(ARFLAGS) $(OBJS) -o $@
 endif