diff --git a/target/linux/brcm47xx/base-files/lib/preinit/05_init_interfaces_brcm b/target/linux/brcm47xx/base-files/lib/preinit/05_init_interfaces_brcm
index 6d43217234..f5aebf5705 100644
--- a/target/linux/brcm47xx/base-files/lib/preinit/05_init_interfaces_brcm
+++ b/target/linux/brcm47xx/base-files/lib/preinit/05_init_interfaces_brcm
@@ -21,7 +21,7 @@ check_module () {
 
   insmod "$module" "$params"
   sleep 1
-  grep "^$module" /proc/modules > /dev/null
+  grep -q ^"$module " /proc/modules
   return $?
 }