--- configure.ac	
+++ configure.ac
@@ -1209,7 +1209,7 @@
 				LDFLAGS="$LDFLAGS -L${withval}/lib"
 			fi
 
-			AC_DEFINE(WITH_LDAP_PUBKEY)
+			AC_DEFINE(WITH_LDAP_PUBKEY, 1, [Enable ldap pubkey support])
 			LIBS="-lldap $LIBS"
 			LDAP_MSG="yes"