diff --git a/packages/linux-firmware/install b/packages/linux-firmware/install
index f0a3661bdb..190e617c60 100755
--- a/packages/linux-firmware/install
+++ b/packages/linux-firmware/install
@@ -2,16 +2,16 @@
 
 . config/options $1
 
-for firmware in $FIRMWARE; do
+for firmware in "$FIRMWARE"; do
 
-  [ $firmware = ipw2100 ] && $SCRIPTS/install ipw2100-fw
-  [ $firmware = ipw2200 ] && $SCRIPTS/install ipw2200-fw
-  [ $firmware = iwl1000 ] && $SCRIPTS/install iwlwifi-1000-ucode
-  [ $firmware = iwl3945 ] && $SCRIPTS/install iwlwifi-3945-ucode
-  [ $firmware = iwl4965 ] && $SCRIPTS/install iwlwifi-4965-ucode
-  [ $firmware = iwl5000 ] && $SCRIPTS/install iwlwifi-5000-ucode
-  [ $firmware = iwl5150 ] && $SCRIPTS/install iwlwifi-5150-ucode
-  [ $firmware = iwl6000 ] && $SCRIPTS/install iwlwifi-6000-ucode
+  [ "$firmware" = ipw2100 ] && $SCRIPTS/install ipw2100-fw
+  [ "$firmware" = ipw2200 ] && $SCRIPTS/install ipw2200-fw
+  [ "$firmware" = iwl1000 ] && $SCRIPTS/install iwlwifi-1000-ucode
+  [ "$firmware" = iwl3945 ] && $SCRIPTS/install iwlwifi-3945-ucode
+  [ "$firmware" = iwl4965 ] && $SCRIPTS/install iwlwifi-4965-ucode
+  [ "$firmware" = iwl5000 ] && $SCRIPTS/install iwlwifi-5000-ucode
+  [ "$firmware" = iwl5150 ] && $SCRIPTS/install iwlwifi-5150-ucode
+  [ "$firmware" = iwl6000 ] && $SCRIPTS/install iwlwifi-6000-ucode
 
 done