diff --git a/include/boost/geometry/formulas/meridian_inverse.hpp b/include/boost/geometry/formulas/meridian_inverse.hpp
index c21196f5c..808f31508 100644
--- a/include/boost/geometry/formulas/meridian_inverse.hpp
+++ b/include/boost/geometry/formulas/meridian_inverse.hpp
@@ -113,8 +113,8 @@ public :
     template <typename T, typename Spheroid>
     static CT apply(T lat, Spheroid const& spheroid)
     {
-        CT const a = get_radius<0>(spheroid);
-        CT const f = formula::flattening<CT>(spheroid);
+        CT const a = geometry::get_radius<0>(spheroid);
+        CT const f = flattening<CT>(spheroid);
         CT n = f / (CT(2) - f);
         CT M = a/(1+n);
         CT C0 = 1;
diff --git a/include/boost/geometry/formulas/vincenty_inverse.hpp b/include/boost/geometry/formulas/vincenty_inverse.hpp
index 7789e17e9..b2f2500ff 100644
--- a/include/boost/geometry/formulas/vincenty_inverse.hpp
+++ b/include/boost/geometry/formulas/vincenty_inverse.hpp
@@ -98,7 +98,7 @@ public:
 
         CT const radius_a = CT(get_radius<0>(spheroid));
         CT const radius_b = CT(get_radius<2>(spheroid));
-        CT const f = formula::flattening<CT>(spheroid);
+        CT const f = flattening<CT>(spheroid);
 
         // U: reduced latitude, defined by tan U = (1-f) tan phi
         CT const one_min_f = c1 - f;