--- src/load-graph.cpp.orig	2015-01-23 09:15:58.000000000 +0100
+++ src/load-graph.cpp	2015-04-06 20:28:18.053368000 +0200
@@ -470,7 +470,7 @@
         // e.g: ceil(100.5 KiB) = 101 KiB = 101 * 2**(1 * 10)
         //      where base10 = 1, coef10 = 101, pow2 = 16
 
-        guint64 pow2 = std::floor(log2(new_max));
+	guint64 pow2 = std::floor(log(new_max) / log(2));
         guint64 base10 = pow2 / 10.0;
         guint64 coef10 = std::ceil(new_max / double(G_GUINT64_CONSTANT(1) << (base10 * 10)));
         g_assert(new_max <= (coef10 * (G_GUINT64_CONSTANT(1) << (base10 * 10))));