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-rw-r--r--src/variable.c2
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);