diff --git a/README.md b/README.md
index ef869c8..123b678 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-### Amuse {#mainpage}
+### Amuse
 
 **Amuse** is a real-time MIDI and SFX sequencer, with basic effects, 
 3D positional audio and surround-output capabilities.
diff --git a/lib/SongState.cpp b/lib/SongState.cpp
index 749fa34..0f4f823 100644
--- a/lib/SongState.cpp
+++ b/lib/SongState.cpp
@@ -1,6 +1,7 @@
 #include "amuse/SongState.hpp"
 #include "amuse/Common.hpp"
 #include "amuse/Sequencer.hpp"
+#include <cmath>
 
 namespace amuse
 {