1 files changed, 1 insertions, 1 deletions

diff --git a/include/opkele/iterator.h b/include/opkele/iterator.h
index 8f86234..94da7e4 100644
--- a/include/opkele/iterator.h
+++ b/include/opkele/iterator.h
@@ -100,13 +100,13 @@ namespace opkele {
                     : I(new forward_iterator_proxy_impl<IT>(i)) { }
                 forward_iterator_proxy(const forward_iterator_proxy<T,TR,TP>& x)
                     : I(x.I->dup()) { }
                 ~forward_iterator_proxy() { delete I; }
 
                 forward_iterator_proxy& operator=(const forward_iterator_proxy<T,TR,TP>& x) {
-                    delete I; I = x.I->dup(); }
+                    delete I; I = x.I->dup(); return *this; }
 
                 bool operator==(const forward_iterator_proxy<T,TR,TP>& x) const {
                     return (*I)==(*(x.I)); }
                 bool operator!=(const forward_iterator_proxy<T,TR,TP>& x) const {
                     return (*I)!=(*(x.I)); }