diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 830d961f605d1e42198ba57c54ad603c2d72455b..752aad7d1ff76566c26438aa640d05a14c7df31e 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -63,7 +63,7 @@ syscall_handler (struct intr_frame *f UNUSED)
     default:
         printf("ERROR: system call ( %d ) has not implemented!\n", syscall_number);
     /* Terminate. */
-    syscall_exit(-1)
+    syscall_exit(-1);
     break;
   }
 }