diff --git a/boost/fusion/adapted/std_array/tag_of.hpp b/boost/fusion/adapted/std_array/tag_of.hpp
index c0e1c089..f307be2d 100644
--- a/boost/fusion/adapted/std_array/tag_of.hpp
+++ b/boost/fusion/adapted/std_array/tag_of.hpp
@@ -15,7 +15,7 @@
 namespace std 
 { 
     template<typename T, std::size_t N>
-    class array;
+    struct array;
 }
 
 namespace boost { namespace fusion