--- src/faulthandler.h.old	2012-07-25 14:37:32.000000000 +0200
+++ src/faulthandler.h	2012-07-25 14:38:16.000000000 +0200
@@ -50,6 +50,7 @@
 #include <signal.h>
 #include <string>
 #include <sstream>
+#include <unistd.h>
 
 // Note: use --export-dynamic as linker option or you won't get function names here.