1 files changed, 1 insertions, 1 deletions

diff --git a/start.c b/start.c
index ce22be8..c4689dc 100644
--- a/start.c
+++ b/start.c
@@ -52,5 +52,5 @@ mstart()
   w_tp(id);
 
   // call main() in supervisor mode.
-  asm("mret");
+  asm volatile("mret");
 }