1 files changed, 1 insertions, 0 deletions
diff --git a/object.c b/object.c
index 84d7a3b10b..286fc589e6 100644
--- a/object.c
+++ b/object.c
@@ -386,6 +386,7 @@ mod_clone(module)
     clone->super = RCLASS(module)->super;
     clone->iv_tbl = 0;
     clone->m_tbl = 0;		/* avoid GC crashing  */
+    clone->iv_tbl = st_copy(RCLASS(module)->iv_tbl);
     clone->m_tbl = st_copy(RCLASS(module)->m_tbl);
 
     return (VALUE)clone;