Index: evolution-2.29.3.1/configure.ac
===================================================================
--- evolution-2.29.3.1.orig/configure.ac
+++ evolution-2.29.3.1/configure.ac
@@ -605,7 +605,7 @@ if test "$os_win32" != yes; then
 
 	SAVE_CFLAGS="$CFLAGS"
 	SAVE_LIBS="$LIBS"
-	LDAP_CFLAGS="$LDAP_CFLAGS -DLDAP_DEPRECATED"
+	LDAP_CFLAGS="$LDAP_CFLAGS -DLDAP_DEPRECATED -I$with_openldap/include"
 	CFLAGS="$CFLAGS $LDAP_CFLAGS"
 	LIBS="$LIBS $LDAP_LIBS"
 	AC_CHECK_FUNCS(ldap_ntlm_bind)