--- sonik-1.0.0b/base/sonik_sigproc.h	2009-01-23 19:10:07.000000000 -0400
+++ sonik-1.0.0/base/sonik_sigproc.h	2009-01-23 19:09:35.000000000 -0400
@@ -26,7 +26,8 @@
 
 #include <qstring.h>
 
-#include <cmath>
+#include <cmath> //fabs
+#include <cstdlib> //abs
 
 namespace Sonik
 {