Index: rrdcollect-0.2.9/src/checkpid.c
===================================================================
--- rrdcollect-0.2.9.orig/src/checkpid.c	2010-04-07 17:37:13.678623387 +0200
+++ rrdcollect-0.2.9/src/checkpid.c	2010-04-07 17:37:20.906624813 +0200
@@ -20,6 +20,7 @@
 
 #include "rrdcollect.h"
 #include <fcntl.h>
+#include <sys/file.h>
 
 /* lockfile in rrdcollect.pid */
 /* five digits+"\n\0" */