diff --git a/clatd.c b/clatd.c
index 1333e30..c2199ac 100644
--- a/clatd.c
+++ b/clatd.c
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#include <sys/prctl.h>
 #include <sys/stat.h>
 #include <string.h>
 #include <errno.h>