diff --git a/packages/sysutils/busybox/init.d/35_wakeup b/packages/sysutils/busybox/init.d/35_wakeup
index 69714d1e94..8ad0440b36 100644
--- a/packages/sysutils/busybox/init.d/35_wakeup
+++ b/packages/sysutils/busybox/init.d/35_wakeup
@@ -26,7 +26,7 @@
   if [ -f /proc/acpi/wakeup ]; then
     progress "enable WakeUp devices"
 
-    for device in `cat /proc/acpi/wakeup |grep "*disabled" | cut -f1 -d " "`; do
+    for device in `cat /proc/acpi/wakeup | grep "^US[B,0-9]" | grep "*disabled" | cut -f1 -d " "`; do
       echo -n $device > /proc/acpi/wakeup
     done
   fi