variable.c: first iv allocation size should be 4 instead of 1.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/variable.c b/src/variable.c
index 1130b7aaf..bef0f0823 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -39,7 +39,7 @@ static void
 iv_rehash(mrb_state *mrb, iv_tbl *t)
 {
   size_t old_alloc = t->alloc;
-  size_t new_alloc = old_alloc+1;
+  size_t new_alloc = old_alloc+4;
   mrb_value *old_ptr = t->ptr;
 
   khash_power2(new_alloc);