1 files changed, 2 insertions, 0 deletions
diff --git a/array.c b/array.c
index f42eb9f82..0ec6c6e9a 100644
--- a/array.c
+++ b/array.c
@@ -2867,6 +2867,8 @@ flatten(VALUE ary, int level, int *modified)
 	ary = rb_ary_pop(stack);
     }
 
+    st_free_table(memo);
+
     return result;
 }