diff --git a/src/vm.c b/src/vm.c
index f87e5053..1692c9ee 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -815,7 +815,7 @@ pic_apply(pic_state *pic, struct pic_proc *proc, pic_value argv)
   } VM_LOOP_END;
 }
 
-struct pic_code trampoline_iseq[] = {
+static struct pic_code trampoline_iseq[] = {
   { OP_NOP,		{0} },
   { OP_TAILCALL,	{0} },
 };