diff --git a/repos/base-hw/src/core/spec/x86_64/mode_transition.s b/repos/base-hw/src/core/spec/x86_64/mode_transition.s
index d8c651490f..52f1d1bc2e 100644
--- a/repos/base-hw/src/core/spec/x86_64/mode_transition.s
+++ b/repos/base-hw/src/core/spec/x86_64/mode_transition.s
@@ -170,6 +170,7 @@
 
 	/* Restore kernel segment registers */
 	mov $0x10, %rbx
+	mov %rbx, %ss
 	mov %rbx, %ds
 	mov %rbx, %es
 	mov %rbx, %fs