Index: dssi-0.9.1/examples/trivial_sampler_qt_gui.cpp
===================================================================
--- dssi-0.9.1.orig/examples/trivial_sampler_qt_gui.cpp
+++ dssi-0.9.1/examples/trivial_sampler_qt_gui.cpp
@@ -23,6 +23,7 @@
 #include <qgroupbox.h>
 #include <iostream>
 #include <unistd.h>
+#include <cstdlib>
 #include <math.h>
 #include <sndfile.h>