1 files changed, 1 insertions, 1 deletions
diff --git a/src/gc.c b/src/gc.c
index 96013da00..bcd0b29b6 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -295,7 +295,7 @@ MRB_API void*
 mrb_alloca(mrb_state *mrb, size_t size)
 {
   struct RString *s;
-  s = (struct RString*)mrb_obj_alloc(mrb, MRB_TT_STRING, mrb->string_class);
+  s = MRB_OBJ_ALLOC(mrb, MRB_TT_STRING, mrb->string_class);
   return s->as.heap.ptr = (char*)mrb_malloc(mrb, size);
 }