diff --git a/src/load.c b/src/load.c
index 55e0845f3..07b36a6c3 100644
--- a/src/load.c
+++ b/src/load.c
@@ -191,7 +191,7 @@ read_irep_record_1(mrb_state *mrb, const uint8_t *bin, size_t *len, uint8_t flag
     }
   }
 
-  irep->reps = (mrb_irep**)mrb_malloc(mrb, sizeof(mrb_irep*)*irep->rlen);
+  irep->reps = (mrb_irep**)mrb_calloc(mrb, irep->rlen, sizeof(mrb_irep*));
 
   diff = src - bin;
   mrb_assert_int_fit(ptrdiff_t, diff, size_t, SIZE_MAX);