diff -ru fwbuilder-5.0.1.3592.orig/src/libfwbuilder/src/fwbuilder/ThreadTools.h fwbuilder-5.0.1.3592/src/libfwbuilder/src/fwbuilder/ThreadTools.h
--- fwbuilder-5.0.1.3592.orig/src/libfwbuilder/src/fwbuilder/ThreadTools.h	2012-04-21 19:25:26.684127714 +0200
+++ fwbuilder-5.0.1.3592/src/libfwbuilder/src/fwbuilder/ThreadTools.h	2012-04-21 19:26:05.308091572 +0200
@@ -31,6 +31,7 @@
 
 #include <time.h> //for time_t definition
 #include <pthread.h>
+#include <unistd.h>  // for ssize_t
 
 #include <string>
 #include <queue>