1 files changed, 3 insertions, 0 deletions
diff --git a/struct.c b/struct.c
index f87b33b050..671788fc10 100644
--- a/struct.c
+++ b/struct.c
@@ -39,6 +39,9 @@ rb_struct_s_members(VALUE klass)
     if (NIL_P(members)) {
 	rb_raise(rb_eTypeError, "uninitialized struct");
     }
+    if (TYPE(members) != T_ARRAY) {
+	rb_raise(rb_eTypeError, "corrupted struct");
+    }
     return members;
 }