diff --git a/include/sqlpp11/detail/sum.h b/include/sqlpp11/detail/sum.h
deleted file mode 100644
index 8a0b762b..00000000
--- a/include/sqlpp11/detail/sum.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (c) 2013-2015, Roland Bock
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- *   Redistributions of source code must retain the above copyright notice, this
- *   list of conditions and the following disclaimer.
- *
- *   Redistributions in binary form must reproduce the above copyright notice, this
- *   list of conditions and the following disclaimer in the documentation and/or
- *   other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SQLPP11_DETAIL_SUM_H
-#define SQLPP11_DETAIL_SUM_H
-
-namespace sqlpp
-{
-  namespace detail
-  {
-    /** a non-recursive C++14 version
-      template<typename... Args>
-      constexpr std::size_t sum(Args... args)
-      {
-      std::size_t result = 0;
-
-        using swallow = int[];
-        (void) swallow{(result += args, 0)...};
-
-        return result;
-      }
-      */
-
-    constexpr std::size_t sum()
-    {
-      return 0;
-    }
-
-    template <typename Arg, typename... Rest>
-    constexpr std::size_t sum(Arg arg, Rest... rest)
-    {
-      return arg + sum(rest...);
-    }
-  }  // namespace detail
-}  // namespace sqlpp
-
-#endif
diff --git a/include/sqlpp11/from.h b/include/sqlpp11/from.h
index 8f3e950e..93e5257f 100644
--- a/include/sqlpp11/from.h
+++ b/include/sqlpp11/from.h
@@ -27,7 +27,6 @@
 #ifndef SQLPP11_FROM_H
 #define SQLPP11_FROM_H
 
-#include <sqlpp11/detail/sum.h>
 #include <sqlpp11/dynamic_join.h>
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/interpretable_list.h>