diff --git a/patches/uefi.patch b/patches/uefi.patch
index 31a8ef38..1b1f953b 100644
--- a/patches/uefi.patch
+++ b/patches/uefi.patch
@@ -928,8 +928,7 @@ index ac70e771c86..6af5cfed963 100644
  GRUB_TERMINALS =
  GRUB_SERIAL_CONFIG =
  GRUB_TERMINAL_CONFIG =
-@@ -43,6 +44,9 @@ endif
- SIGNATURE:=$(shell perl -e 'printf("%08x", rand(0xFFFFFFFF))')
+@@ -43,5 +44,8 @@ endif
  ROOTPART:=$(call qstrip,$(CONFIG_TARGET_ROOTFS_PARTNAME))
  ROOTPART:=$(if $(ROOTPART),$(ROOTPART),PARTUUID=$(SIGNATURE)-02)
 +EFI_SIGNATURE:=$(strip $(shell uuidgen | sed -r 's/[a-zA-Z0-9]{2}$$/00/'))