diff --git a/entryother.S b/entryother.S
index 3e502f3..dd33680 100644
--- a/entryother.S
+++ b/entryother.S
@@ -39,7 +39,7 @@ start:
   # Complete the transition to 32-bit protected mode by using a long jmp
   # to reload %cs and %eip.  The segment descriptors are set up with no
   # translation, so that the mapping is still the identity mapping.
-  ljmpl    $(KCSEG32), $start32
+  ljmpl    $(SEG_KCODE32), $start32
 
 .code32
 start32:
diff --git a/usys.S b/usys.S
index e62f3d9..69935e7 100644
--- a/usys.S
+++ b/usys.S
@@ -4,7 +4,7 @@
 #define SYSCALL(name) \
   .globl name; \
   name: \
-    movl $SYS_ ## name, %eax; \
+    mov $SYS_ ## name, %rax; \
     syscall; \
     ret