diff --git a/rc.sysinit b/rc.sysinit
index c4ebd77..3daad5a 100755
--- a/rc.sysinit
+++ b/rc.sysinit
@@ -67,6 +67,37 @@ if [ -n "$HWCLOCK_PARAMS" ]; then
 	fi
 fi
 
+# Build module blacklist
+BLACKLIST="${MOD_BLACKLIST[@]}"
+
+if [ -f /proc/cmdline ]; then 
+    for cmd in $(cat /proc/cmdline); do
+        case $cmd in
+            disablemodules=*) eval $cmd ;;
+        esac
+    done
+    #parse cmdline entries of the form "disablemodules=x,y,z"
+    if [ -n "$disablemodules" ]; then
+        BLACKLIST="$BLACKLIST $(echo $disablemodules | sed 's|,| |g')"
+    fi
+    unset disablemodules
+fi
+
+#MODULES entries in rc.conf that begin with ! are blacklisted
+for mod in ${MODULES[@]}; do
+    if [ "${mod}" != "${mod#!}" ]; then
+        BLACKLIST="$BLACKLIST ${mod#!}"
+    fi
+done
+
+touch /dev/.blacklist.sys.conf
+# /dev/.blacklist.sys.conf = /etc/modprobe.d/blacklist.sys.conf (symlink)
+for d in ${BLACKLIST}; do
+    echo "install ${d} /bin/false" >>/dev/.blacklist.sys.conf
+done
+
+unset BLACKLIST
+
 echo > /proc/sys/kernel/hotplug
 
 stat_busy "Starting UDev Daemon"