diff --git a/korlib/generate_mipmap.cpp b/korlib/generate_mipmap.cpp
index 09f6263..9935fd1 100644
--- a/korlib/generate_mipmap.cpp
+++ b/korlib/generate_mipmap.cpp
@@ -179,8 +179,8 @@ extern "C" PyObject* generate_mipmap(PyObject*, PyObject* args)
     // Step 1: Resize to POT (if needed) -- don't rely on GLU for this because it may not suppport
     //         NPOT if we're being run on some kind of dinosaur...
     imagesize_t dimensions = get_image_size(blImage);
-    size_t width = pow(2., korlib::log2(static_cast<double>(std::get<0>(dimensions))));
-    size_t height = pow(2., korlib::log2(static_cast<double>(std::get<1>(dimensions))));
+    size_t width = pow(2, log2(std::get<0>(dimensions)));
+    size_t height = pow(2, log2(std::get<1>(dimensions)));
     if (std::get<0>(dimensions) != width || std::get<1>(dimensions) != height) {
         print("\tImage is not a POT (%dx%d)... resizing to %dx%d", std::get<0>(dimensions),
               std::get<1>(dimensions), width, height);
diff --git a/korlib/utils.hpp b/korlib/utils.hpp
index 5a568f5..49ba277 100644
--- a/korlib/utils.hpp
+++ b/korlib/utils.hpp
@@ -77,13 +77,6 @@ namespace korlib
         pyref attr = PyObject_GetAttrString(o, name);
         return PyLong_AsSize_t(attr);
     }
-
-    /** MSVC++ is not C99 compliant :( */
-    double log2(double v)
-    {
-        static double hack = log(2.);
-        return log(v) / hack;
-    }
 };
 
 #endif // __KORLIB_UTILS_HPP
diff --git a/korman/__init__.py b/korman/__init__.py
index 940b014..e128570 100644
--- a/korman/__init__.py
+++ b/korman/__init__.py
@@ -21,7 +21,7 @@ from . import operators
 bl_info = {
     "name":        "Korman",
     "author":      "Guild of Writers",
-    "blender":     (2, 70, 0),  # I can't be bothered to support old stuff
+    "blender":     (2, 71, 0),  # I can't be bothered to support old stuff
     "location":    "File > Import-Export",
     "description": "Exporter for Cyan Worlds' Plasma Engine",
     "warning":     "alpha",