diff --git a/repos/base-hw/src/bootstrap/spec/arm_64/crt0.s b/repos/base-hw/src/bootstrap/spec/arm_64/crt0.s
index 2bd36bf04d..7517485e70 100644
--- a/repos/base-hw/src/bootstrap/spec/arm_64/crt0.s
+++ b/repos/base-hw/src/bootstrap/spec/arm_64/crt0.s
@@ -92,4 +92,4 @@
 		.space STACK_SIZE
 	.endr
 	_crt0_start_stack:
-	.long STACK_SIZE
+	.quad STACK_SIZE