diff --git a/src/codedump.c b/src/codedump.c
index 4b1ee02a6..faa75c125 100644
--- a/src/codedump.c
+++ b/src/codedump.c
@@ -648,3 +648,4 @@ mrb_codedump_all(mrb_state *mrb, struct RProc *proc)
   mrb_codedump_all_file(mrb, proc, stdout);
 #endif
 }
+#undef CASE
diff --git a/src/vm.c b/src/vm.c
index 5b72c141c..219e4e99f 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -3448,3 +3448,4 @@ mrb_top_run(mrb_state *mrb, const struct RProc *proc, mrb_value self, mrb_int st
   }
   return mrb_vm_run(mrb, proc, self, stack_keep);
 }
+#undef CASE