Index: detail/float_functions.hpp
===================================================================
--- detail/float_functions.hpp	(revision 53823)
+++ detail/float_functions.hpp	(working copy)
@@ -130,7 +130,7 @@
                 template <typename T>                                   \
                 inline type1 operator()(type1 a, T b)  const            \
                 {                                                       \
-                    return c99_func(a, b);                              \
+                    return static_cast<type1>(c99_func(a, b));          \
                 }                                                       \
             };                                                          \
                                                                         \
@@ -147,7 +147,7 @@
                 template <typename T>                                   \
                 inline type1 operator()(type1 a, T b)  const            \
                 {                                                       \
-                    return cpp_func(a, b);                              \
+                    return static_cast<type1>(cpp_func(a, b));          \
                 }                                                       \
             };                                                          \
         }                                                               \
@@ -168,7 +168,7 @@
         struct call_##cpp_func<type1> {                                 \
             typedef type1 float_type;                                   \
             inline type1 operator()(type1 x, type2 y) const {           \
-                return c99_func(x, y);                                  \
+                return static_cast<type1>(c99_func(x, y));              \
             }                                                           \
         };                                                              \
     }                                                                   \