diff --git a/efiboot/zz-pve-efiboot b/efiboot/zz-pve-efiboot
index 1985d65..afdd665 100755
--- a/efiboot/zz-pve-efiboot
+++ b/efiboot/zz-pve-efiboot
@@ -51,7 +51,7 @@ update_esps() {
 	else
 		warn "No /etc/kernel/cmdline found - falling back to /proc/cmdline"
 		# remove initrd entries
-		CMDLINE="$(awk '{ gsub(/\yinitrd=([0-9a-zA-Z\/\\._-])*\s*/, ""); print $0 }' /proc/cmdline)"
+		CMDLINE="$(perl -pe 's/\binitrd=([0-9a-zA-Z\\\/.-])*\s*//g;' /proc/cmdline)"
 	fi
 
 	loop_esp_list update_esp_func