diff --git a/sys/arm64/arm64/locore.S b/sys/arm64/arm64/locore.S
--- a/sys/arm64/arm64/locore.S
+++ b/sys/arm64/arm64/locore.S
@@ -117,7 +117,7 @@
 	ldr	x15, .Lbss
 	ldr	x14, .Lend
 1:
-	str	xzr, [x15], #8
+	stp	xzr, xzr, [x15], #16
 	cmp	x15, x14
 	b.lo	1b
 
diff --git a/sys/conf/ldscript.arm64 b/sys/conf/ldscript.arm64
--- a/sys/conf/ldscript.arm64
+++ b/sys/conf/ldscript.arm64
@@ -119,6 +119,7 @@
   .sdata     : { *(.sdata) }
   _edata  =  .;
   PROVIDE (edata = .);
+  . = ALIGN(16);
   __bss_start = .;
   .sbss      : { *(.sbss) *(.scommon) }
   .bss       :
@@ -126,7 +127,7 @@
    *(.dynbss)
    *(.bss)
    *(COMMON)
-   . = ALIGN(8);
+   . = ALIGN(16);
    __bss_end = .;
    /* A section for the initial page table, it doesn't need to be in the
       kernel file, however unlike normal .bss entries should not be zeroed