diff --git a/CMakeLists.txt b/CMakeLists.txt
index fbee8d3b..0118de99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -230,7 +230,6 @@ list (
     geom/fwd.hpp
     geom/aabb.cpp
     geom/aabb.hpp
-    geom/aabb.ipp
     geom/cylinder.cpp
     geom/cylinder.hpp
     geom/ellipse.cpp
diff --git a/geom/aabb.hpp b/geom/aabb.hpp
index a471136c..de82c9a2 100644
--- a/geom/aabb.hpp
+++ b/geom/aabb.hpp
@@ -79,6 +79,26 @@ namespace util::geom {
     typedef aabb<3,int> aabb3i;
 }
 
-#include "aabb.ipp"
+
+///////////////////////////////////////////////////////////////////////////////
+#include "./sample.hpp"
+
+#include <random>
+
+namespace util::geom {
+    template <size_t S, typename T, typename G>
+    struct sampler<S,T,aabb,G> {
+        static point<S,T>
+        fn (aabb<S,T> b, G &g)
+        {
+            std::uniform_real_distribution<T> d;
+
+            point<S,T> p;
+            std::generate (p.begin (), p.end (), [&] (void) { return d (g); });
+
+            return p * (b.p1 - b.p0) + b.p0.template as<util::vector> ();
+        }
+    };
+}
 
 #endif
diff --git a/geom/aabb.ipp b/geom/aabb.ipp
deleted file mode 100644
index 6e13332e..00000000
--- a/geom/aabb.ipp
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * Copyright 2015 Danny Robson <danny@nerdcruft.net>
- */
-
-#if defined(__UTIL_GEOM_AABB_IPP)
-#error
-#endif
-
-#define __UTIL_GEOM_AABB_IPP
-
-#include "sample.hpp"
-
-#include <random>
-
-
-///////////////////////////////////////////////////////////////////////////////
-namespace util::geom {
-    template <size_t S, typename T, typename G>
-    struct sampler<S,T,aabb,G> {
-        static point<S,T>
-        fn (aabb<S,T> b, G &g)
-        {
-            std::uniform_real_distribution<T> d;
-
-            point<S,T> p;
-            std::generate (p.begin (), p.end (), [&] (void) { return d (g); });
-
-            return p * (b.p1 - b.p0) + b.p0.template as<util::vector> ();
-        }
-    };
-}