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-rw-r--r--src/dumm/ext/dumm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/dumm/ext/dumm.c b/src/dumm/ext/dumm.c
index 7c7d65acd..1f047679c 100644
--- a/src/dumm/ext/dumm.c
+++ b/src/dumm/ext/dumm.c
@@ -141,7 +141,11 @@ static VALUE guest_hash(VALUE class)
if (!rb_cvar_defined(class, id))
{
VALUE hash = guest_hash_create(class);
+#ifdef RB_CVAR_SET_4_ARGS
rb_cvar_set(class, id, hash, 0);
+#else
+ rb_cvar_set(class, id, hash);
+#endif
return hash;
}
return rb_cvar_get(class, id);