--- src/Align/find-tandem.cc	2011-07-25 01:27:26.000000000 +0200
+++ src/Align/find-tandem.cc	2011-07-25 01:27:26.000000000 +0200
@@ -6,6 +6,7 @@
 #include <string>
 #include <vector>
 #include <ctime>
+#include <unistd.h>
 #include <sys/time.h>
 using namespace std;
 
