diff --git a/noise/basis/patch.ipp b/noise/basis/patch.ipp
index a856cafc..86122df0 100644
--- a/noise/basis/patch.ipp
+++ b/noise/basis/patch.ipp
@@ -22,7 +22,6 @@
 #include "../../types.hpp"
 #include "../../ray.hpp"
 #include "../../vector.hpp"
-#include "../../maths/fast.hpp"
 
 
 namespace util { namespace noise { namespace basis {
@@ -75,7 +74,7 @@ namespace util { namespace noise { namespace basis {
 
         T distances[COUNT];
         for (size_t i = 0; i < COUNT; ++i)
-            distances[i] = maths::fast::sqrt (util::distance2 (p_rem, centres[i]));
+            distances[i] = std::sqrt (util::distance2 (p_rem, centres[i]));
 
         // sort the distances, using indices so we can use 'offsets' to generate values
         unsigned indices[COUNT];
@@ -104,7 +103,7 @@ namespace util { namespace noise { namespace basis {
         {
             auto v = generate (p_int + OFFSETS[indices[i]]);
             auto d = (distances[indices[i]] - lo) / (hi - lo);
-            auto w = maths::fast::pow (1-d, m_power);
+            auto w = std::pow (1-d, m_power);
 
             sumw += w;
             out += v * w;