diff --git a/sys/modules/iwmfw/Makefile.inc b/sys/modules/iwmfw/Makefile.inc
index eaa0e32d109..89ae353073c 100644
--- a/sys/modules/iwmfw/Makefile.inc
+++ b/sys/modules/iwmfw/Makefile.inc
@@ -15,4 +15,4 @@ FIRMWS=	${_FIRM}:${KMOD}
 #FIRMWARE_LICENSE=
 
 ${_FIRM}: ${SRCTOP}/sys/contrib/dev/iwm/${_FIRM}.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
diff --git a/sys/modules/iwnfw/Makefile.inc b/sys/modules/iwnfw/Makefile.inc
index 17d112785a2..32355f387ec 100644
--- a/sys/modules/iwnfw/Makefile.inc
+++ b/sys/modules/iwnfw/Makefile.inc
@@ -15,4 +15,4 @@ FIRMWS=	${_FIRM}:${KMOD}
 #FIRMWARE_LICENSE=
 
 ${_FIRM}: ${SRCTOP}/sys/contrib/dev/iwn/${_FIRM}.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
diff --git a/sys/modules/mwlfw/Makefile b/sys/modules/mwlfw/Makefile
index 1e6a1e8503e..177ac5880d8 100644
--- a/sys/modules/mwlfw/Makefile
+++ b/sys/modules/mwlfw/Makefile
@@ -6,9 +6,9 @@ FIRMWS=	mw88W8363.fw:mw88W8363fw mwlboot.fw:mwlboot
 CLEANFILES+= mw88W8363.fw mwlboot.fw
 
 mw88W8363.fw: ${SRCTOP}/sys/contrib/dev/mwl/mw88W8363.fw.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
 
 mwlboot.fw: ${SRCTOP}/sys/contrib/dev/mwl/mwlboot.fw.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
 
 .include <bsd.kmod.mk>
diff --git a/sys/modules/ralfw/Makefile.inc b/sys/modules/ralfw/Makefile.inc
index 9922352372e..678648a53fd 100644
--- a/sys/modules/ralfw/Makefile.inc
+++ b/sys/modules/ralfw/Makefile.inc
@@ -12,4 +12,4 @@ CLEANFILES+=	${_FIRM}
 FIRMWS=	${_FIRM}:${KMOD}
 
 ${_FIRM}: ${SRCTOP}/sys/contrib/dev/ral/${_FIRM}.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
diff --git a/sys/modules/rtwnfw/Makefile.inc b/sys/modules/rtwnfw/Makefile.inc
index 2a7865d94bf..f38e5e41fcd 100644
--- a/sys/modules/rtwnfw/Makefile.inc
+++ b/sys/modules/rtwnfw/Makefile.inc
@@ -12,4 +12,4 @@ FIRMWS=	${_FIRM}:${KMOD}:111
 # FIRMWARE_LICENSE=	realtek
 
 ${_FIRM}: ${SRCTOP}/sys/contrib/dev/rtwn/${_FIRM}.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
diff --git a/sys/modules/usb/rsufw/Makefile.inc b/sys/modules/usb/rsufw/Makefile.inc
index 2f9817762ef..1b15e66fd17 100644
--- a/sys/modules/usb/rsufw/Makefile.inc
+++ b/sys/modules/usb/rsufw/Makefile.inc
@@ -12,4 +12,4 @@ FIRMWS=	${_FIRM}:${KMOD}:120
 # FIRMWARE_LICENSE=	realtek
 
 ${_FIRM}: ${SRCTOP}/sys/contrib/dev/rsu/${_FIRM}.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
diff --git a/sys/modules/usb/runfw/Makefile b/sys/modules/usb/runfw/Makefile
index 47d09a56c42..b60b26c3e13 100644
--- a/sys/modules/usb/runfw/Makefile
+++ b/sys/modules/usb/runfw/Makefile
@@ -6,6 +6,6 @@ FIRMWS=	run.fw:runfw:1
 CLEANFILES=	run.fw
 
 run.fw: ${SRCTOP}/sys/contrib/dev/run/rt2870.fw.uu
-	uudecode -p $? > ${.TARGET}
+	uudecode -p ${.ALLSRC} > ${.TARGET}
 
 .include <bsd.kmod.mk>