diff --git a/modules.d/95iscsi/iscsiroot b/modules.d/95iscsi/iscsiroot
index 8e20fda1..277c1290 100755
--- a/modules.d/95iscsi/iscsiroot
+++ b/modules.d/95iscsi/iscsiroot
@@ -17,6 +17,16 @@ for conf in conf/conf.d/*; do
 	[ -f ${conf} ] && . ${conf}
 done
 
+# Huh? Empty $1?
+[ -z "$1" ] && exit 1
+
+# Huh? Empty $2?
+[ -z "$2" ] && exit 1
+
+# Huh? Empty $3? This isn't really necessary, since NEWROOT isn't 
+# used here. But let's be consistent
+[ -z "$3" ] && exit 1
+
 # root is in the form root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
 netif="$1"
 root="$2"
diff --git a/modules.d/95nbd/nbdroot b/modules.d/95nbd/nbdroot
index 2302696d..91f6192f 100755
--- a/modules.d/95nbd/nbdroot
+++ b/modules.d/95nbd/nbdroot
@@ -12,6 +12,15 @@ if getarg rdnetdebug; then
     set -x
 fi
 
+# Huh? Empty $1?
+[ -z "$1" ] && exit 1
+
+# Huh? Empty $2?
+[ -z "$2" ] && exit 1
+
+# Huh? Empty $3?
+[ -z "$3" ] && exit 1
+
 # root is in the form root=nbd:server:port:fstype:fsopts:nbdopts
 netif="$1"
 root="$2"
diff --git a/modules.d/95nfs/nfsroot b/modules.d/95nfs/nfsroot
index 849fadf3..ec094b31 100755
--- a/modules.d/95nfs/nfsroot
+++ b/modules.d/95nfs/nfsroot
@@ -12,6 +12,15 @@ getarg rdnetdebug && {
     set -x
 }
 
+# Huh? Empty $1?
+[ -z "$1" ] && exit 1
+
+# Huh? Empty $2?
+[ -z "$2" ] && exit 1
+
+# Huh? Empty $3?
+[ -z "$3" ] && exit 1
+
 # root is in the form root=nfs[4]:server:path:[options]
 netif="$1"
 root="$2"