diff --git a/initrd/bin/poweroff b/initrd/bin/poweroff
index 9e97d95c..a27da23b 100755
--- a/initrd/bin/poweroff
+++ b/initrd/bin/poweroff
@@ -9,7 +9,7 @@ if [ "$CONFIG_TPM" = "y" ]; then
 fi
 
 # Run special EC-based poweroff for Nitropad-Nxx
-if [ "${CONFIG_BOARD%_*}" = nitropad-nv41 || "${CONFIG_BOARD%_*}" = nitropad-ns51 ]; then
+if [ "$CONFIG_BOARD" = "nitropad-nv41" ] || [ "$CONFIG_BOARD" = "nitropad-ns50" ]; then
 	/bin/nitropad-shutdown.sh
 fi
 
diff --git a/initrd/bin/reboot b/initrd/bin/reboot
index eb63f253..26255f12 100755
--- a/initrd/bin/reboot
+++ b/initrd/bin/reboot
@@ -18,7 +18,7 @@ if [ "$CONFIG_TPM" = "y" ]; then
 fi
 
 # Run special EC-based poweroff for Nitropad-Nxx
-if [ "${CONFIG_BOARD%_*}" = nitropad-nv41 ] || [ "${CONFIG_BOARD%_*}" = nitropad-ns51 ]; then
+if [ "$CONFIG_BOARD" = "nitropad-nv41" ] || [ "$CONFIG_BOARD" = "nitropad-ns50" ]; then
     /bin/nitropad-shutdown.sh
 fi