diff --git a/grub-core/kern/efi/init.c b/grub-core/kern/efi/init.c
index e759cc315..08e24d46f 100644
--- a/grub-core/kern/efi/init.c
+++ b/grub-core/kern/efi/init.c
@@ -45,7 +45,8 @@ static grub_guid_t rng_protocol_guid = GRUB_EFI_RNG_PROTOCOL_GUID;
  */
 static grub_efi_uint8_t stack_chk_guard_buf[32];
 
-grub_addr_t __stack_chk_guard;
+/* Initialize canary in case there is no RNG protocol. */
+grub_addr_t __stack_chk_guard = (grub_addr_t) 0x00f2b7e2f193b25c;
 
 void __attribute__ ((noreturn))
 __stack_chk_fail (void)