--- pulsestream_old.cpp	2011-05-05 14:12:38.000000000 -0400
+++ pulsestream.cpp	2011-10-18 14:50:39.329749419 -0400
@@ -21,6 +21,7 @@
 */
 
 #include "pulsestream_p.h"
+#include <math.h>
 
 QT_BEGIN_NAMESPACE