nits

1 files changed, 3 insertions, 2 deletions

diff --git a/syscall.c b/syscall.c
index 4853e35..d7cf123 100644
--- a/syscall.c
+++ b/syscall.c
@@ -133,8 +133,9 @@ static int (*syscalls[])(void) = {
 void
 syscall(void)
 {
-  int num = cp->tf->eax;
-
+  int num;
+  
+  num = cp->tf->eax;
   if(num >= 0 && num < NELEM(syscalls) && syscalls[num])
     cp->tf->eax = syscalls[num]();
   else {