diff --git a/userprog/system_calls.h b/userprog/system_calls.h
index f850b7e0944dd41eddb97793d65cc9223aeb645b..7d74bc4a643531d24018716cc1e831fbd47cc98c 100644
--- a/userprog/system_calls.h
+++ b/userprog/system_calls.h
@@ -38,6 +38,8 @@ void syscall_wait(struct intr_frame *f);
  * "file descriptor" (fd), or -1 if the file could not be opened.
  */
 void syscall_open(struct intr_frame *f);
+
+/*
  * Creates a new file called file initially initial_size bytes in size.
  * Returns true if successful, false otherwise.
  */