diff --git a/fluent/Callback.h b/fluent/Callback.h
index f2082cb..620d7be 100644
--- a/fluent/Callback.h
+++ b/fluent/Callback.h
@@ -23,6 +23,7 @@
 #include <utility>
 #include <memory>
 #include <type_traits>
+#include <utility>
 
 #include "functional_unwrap.hpp"
 
diff --git a/fluent/Continuable.h b/fluent/Continuable.h
index dad40c6..076b12d 100644
--- a/fluent/Continuable.h
+++ b/fluent/Continuable.h
@@ -219,10 +219,10 @@ namespace detail
         /// Placeholder
         template<typename... _CTy>
         auto any(_CTy&&... functionals)
-            -> decltype(some(1, std::declval<_CTy>()...))
+            -> _ContinuableImpl& // FIXME gcc build &-> decltype(some(1, std::declval<_CTy>()...))
         {
             // Equivalent to invoke `some` with count 1.
-            return some(1, std::forward<_CTy>(functionals)...);
+            return some<_CTy...>(1, std::forward<_CTy>(functionals)...);
         }
 
         /*