Index: src/modules/ldap/ld_session.h
--- src/modules/ldap/ld_session.h.orig
+++ src/modules/ldap/ld_session.h
@@ -30,6 +30,7 @@
 
 #include <sys/time.h>
 #include <ldap.h>
+#include <sys/select.h> /* timeval */
 
 #include "iniparser.h"
 
