diff --git a/modes/Spin.cc b/modes/Spin.cc
index ce1649d..29909a4 100644
--- a/modes/Spin.cc
+++ b/modes/Spin.cc
@@ -2,6 +2,8 @@
 #include <stdlib.h>
 #include <time.h>
 #include <math.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 #include <GL/gl.h>
 #include <GL/glu.h>
@@ -13,7 +15,7 @@ Spin::Spin()
     m_num_monitors = 1;
     m_monitor_info = new monitor_info_t[m_num_monitors];
     m_last_ticks = 0;
-    srand(time(NULL));
+    srand(time(NULL) + getpid());
     initMonitorInfo();
 }