1 files changed, 1 insertions, 1 deletions
diff --git a/src/gc.c b/src/gc.c
index c0d4e1599..59a6b7eb4 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -248,7 +248,7 @@ unlink_free_heap_page(mrb_state *mrb, struct heap_page *page)
 static void
 add_heap(mrb_state *mrb)
 {
-  struct heap_page *page = mrb_calloc(mrb, 1, sizeof(struct heap_page));
+  struct heap_page *page = (struct heap_page *)mrb_calloc(mrb, 1, sizeof(struct heap_page));
   RVALUE *p, *e;
   struct RBasic *prev = NULL;