diff --git a/lxdm/src/greeter.c b/lxdm/src/greeter.c

index 0afd9c7..7a3db6b 100644

--- a/lxdm/src/greeter.c

+++ b/lxdm/src/greeter.c

@@ -32,6 +32,7 @@

 #include <time.h>

 #include <stdlib.h>

 #include <sys/stat.h>

+#include <sys/wait.h>

 #include "lxcom.h"