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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 2902ad288..7395f23c7 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -1108,7 +1108,7 @@ mrb_class_find_path(mrb_state *mrb, struct RClass *c)
name = find_class_sym(mrb, mrb_class_ptr(outer), c);
if (name == 0) return mrb_nil_value();
str = mrb_class_name(mrb, mrb_class_ptr(outer));
- path = mrb_str_new_capa(mrb, 0);
+ path = mrb_str_new_capa(mrb, 40);
mrb_str_cat_cstr(mrb, path, str);
mrb_str_cat_cstr(mrb, path, "::");