diff --git a/nocopy.hpp b/nocopy.hpp
index c90cb0a7..590655e8 100644
--- a/nocopy.hpp
+++ b/nocopy.hpp
@@ -27,8 +27,8 @@ class nocopy {
         nocopy () { ; }
 
     private:
-        nocopy            (const nocopy &) {               ; }
-        nocopy& operator =(const nocopy &) { unreachable (); }
+        nocopy            (const nocopy &) {                             ; }
+        nocopy& operator =(const nocopy &) { unreachable (); return *this; }
 };
 
 #endif