1 files changed, 1 insertions, 1 deletions
diff --git a/src/class.c b/src/class.c
index f5316e272..c49f0f474 100644
--- a/src/class.c
+++ b/src/class.c
@@ -913,7 +913,7 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
       {
         mrb_value **var;
         mrb_int *pl;
-        mrb_bool nocopy = altmode || argv_on_stack ? FALSE : TRUE;
+        mrb_bool nocopy = (altmode || !argv_on_stack) ? TRUE : FALSE;
 
         var = va_arg(ap, mrb_value**);
         pl = va_arg(ap, mrb_int*);