diff --git a/Kernel/Prekernel/Arch/aarch64/boot.S b/Kernel/Prekernel/Arch/aarch64/boot.S
index c5eee1a801..7eaa7fa557 100644
--- a/Kernel/Prekernel/Arch/aarch64/boot.S
+++ b/Kernel/Prekernel/Arch/aarch64/boot.S
@@ -21,6 +21,14 @@ start:
   ldr x14, =start
   mov sp, x14
 
+  // Clear BSS.
+  ldr x14, =start_of_bss
+  ldr x15, =size_of_bss_divided_by_8
+Lbss_clear_loop:
+  str xzr, [x14], #8
+  subs x15, x15, #1
+  bne Lbss_clear_loop
+
   b init
 
 .globl wait_cycles
diff --git a/Kernel/Prekernel/Arch/aarch64/linker.ld b/Kernel/Prekernel/Arch/aarch64/linker.ld
index 9a89f1d4d9..6b093cbd89 100644
--- a/Kernel/Prekernel/Arch/aarch64/linker.ld
+++ b/Kernel/Prekernel/Arch/aarch64/linker.ld
@@ -29,6 +29,10 @@ SECTIONS
 
     .bss ALIGN(4K) (NOLOAD) : AT (ADDR(.bss))
     {
+	start_of_bss = .;
         *(.bss)
+	end_of_bss = .;
     } :bss
 }
+
+size_of_bss_divided_by_8 = (end_of_bss - start_of_bss) / 8;