diff --git a/lua-5.1.2-multilib.patch b/lua-5.1.2-multilib.patch
index d39f002..77092d2 100644
--- a/lua-5.1.2-multilib.patch
+++ b/lua-5.1.2-multilib.patch
@@ -15,3 +15,21 @@ diff -up lua-5.1.2/src/luaconf.h.template.in~ lua-5.1.2/src/luaconf.h.template.i
  /** autotools-patch **/
  
  #define LUA_PATH_DEFAULT  \
+diff -up lua-5.1.2/etc/lua.pc.in~ lua-5.1.2/etc/lua.pc.in
+--- lua-5.1.2/etc/lua.pc.in~	2007-11-26 09:35:47.000000000 +0100
++++ lua-5.1.2/etc/lua.pc.in	2007-11-26 09:35:47.000000000 +0100
+@@ -2,12 +2,12 @@ V= 5.1
+ R= 5.1.2
+ prefix= @prefix@
+ exec_prefix=${prefix}
+-libdir=${exec_prefix}/lib
++libdir= @libdir@
+ includedir=${prefix}/include
+ 
+ Name: Lua
+ Description: An Extensible Extension Language
+ Version: ${R}
+ Requires: 
+-Libs: -L${libdir} -llua @LUA_LIBS@
++Libs: -llua @LUA_LIBS@
+ Cflags: -I${includedir}
diff --git a/lua.spec b/lua.spec
index c5d9e2b..421fa13 100644
--- a/lua.spec
+++ b/lua.spec
@@ -1,6 +1,6 @@
 Name:           lua
 Version:        5.1.2
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Powerful light-weight programming language
 Group:          Development/Languages
 License:        MIT
@@ -77,6 +77,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Mon Nov 26 2007 Hans de Goede <j.w.r.degoede@hhs.nl> 5.1.2-4
+- Fix libdir in lua.pc being /usr/lib on x86_64 (bz 399101)
+
 * Sun Oct 21 2007 Hans de Goede <j.w.r.degoede@hhs.nl> 5.1.2-3
 - Also use lib64 instead of lib on ia64 and sparc64