diff --git a/exim-4.50-config.patch b/exim-4.50-config.patch
index 3199400..912d933 100644
--- a/exim-4.50-config.patch
+++ b/exim-4.50-config.patch
@@ -73,7 +73,7 @@
 +LOOKUP_LDAP=yes
 +LDAP_LIB_TYPE=OPENLDAP2
 +LOOKUP_INCLUDE=-I/usr/include/mysql
-+LOOKUP_LIBS=-lldap -llber -lsqlite3 -L/usr/lib/mysql -lmysqlclient -lpq
++LOOKUP_LIBS=-lldap -llber -lsqlite3 -L/usr/$(_lib)/mysql -lmysqlclient -lpq
 -# LOOKUP_MYSQL=yes
 +LOOKUP_MYSQL=yes
 -# LOOKUP_NIS=yes
diff --git a/exim.spec b/exim.spec
index 118719a..3c43179 100644
--- a/exim.spec
+++ b/exim.spec
@@ -286,6 +286,9 @@ fi
 %doc sa-exim*/{ACKNOWLEDGEMENTS,INSTALL,LICENSE,TODO}
 
 %changelog
+* Sun Nov 13 2005 David Woodhouse <dwmw2@redhat.com> 4.54-4
+- Fix 64-bit build
+
 * Fri Nov 11 2005 David Woodhouse <dwmw2@redhat.com> 4.54-3
 - Update X11 BuildRequires