diff --git a/include/boost/fusion/sequence/intrinsic/assign.hpp b/include/boost/fusion/sequence/intrinsic/assign.hpp
index 2a43dad4..719b2dd7 100644
--- a/include/boost/fusion/sequence/intrinsic/assign.hpp
+++ b/include/boost/fusion/sequence/intrinsic/assign.hpp
@@ -53,7 +53,7 @@ namespace boost { namespace fusion
     }
 
     template <typename Seq1, typename Seq2>
-    inline bool
+    inline void
     assign(Seq1 const& src, Seq2& dest)
     {
         BOOST_STATIC_ASSERT(