diff --git a/lua51-5.1.5-module-path.diff b/lua51-5.1.5-module-path.diff
index ef5faec..8e7e4a8 100644
--- a/lua51-5.1.5-module-path.diff
+++ b/lua51-5.1.5-module-path.diff
@@ -1,7 +1,8 @@
-diff -urNad trunk~/src/luaconf.h trunk/src/luaconf.h
---- trunk~/src/luaconf.h	2006-02-10 12:44:06.000000000 -0500
-+++ trunk/src/luaconf.h	2006-02-17 21:32:55.000000000 -0500
-@@ -83,13 +83,17 @@
+Index: lua-5.1.5/src/luaconf.h
+===================================================================
+--- lua-5.1.5.orig/src/luaconf.h
++++ lua-5.1.5/src/luaconf.h
+@@ -95,13 +95,17 @@
  
  #else
  #define LUA_ROOT	"/usr/local/"
@@ -19,3 +20,5 @@ diff -urNad trunk~/src/luaconf.h trunk/src/luaconf.h
 -	"./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
 +	"./?.so;" LUA_CDIR"?.so;" LUA_CDIR2"?.so;" LUA_CDIR"loadall.so"
  #endif
+ 
+ 
diff --git a/lua51-5.1.5-pkgconfig.patch b/lua51-5.1.5-pkgconfig.patch
new file mode 100644
index 0000000..263b78d
--- /dev/null
+++ b/lua51-5.1.5-pkgconfig.patch
@@ -0,0 +1,13 @@
+Index: lua-5.1.5/etc/lua.pc
+===================================================================
+--- lua-5.1.5.orig/etc/lua.pc
++++ lua-5.1.5/etc/lua.pc
+@@ -25,7 +25,7 @@ Name: Lua
+ Description: An Extensible Extension Language
+ Version: ${R}
+ Requires: 
+-Libs: -llua -lm
++Libs: -llua -lm -ldl
+ Cflags: -I${includedir}
+ 
+ # (end of lua.pc)
diff --git a/lua51.changes b/lua51.changes
index b958752..25c10a8 100644
--- a/lua51.changes
+++ b/lua51.changes
@@ -1,3 +1,16 @@
+-------------------------------------------------------------------
+Tue Oct 22 12:24:49 UTC 2013 - peter.trommler@ohm-hochschule.de
+
+- fix patch lua51-5.1.5-pkgconfig.patch
+* libdl is required not librt 
+
+-------------------------------------------------------------------
+Mon Oct 21 18:19:08 UTC 2013 - peter.trommler@ohm-hochschule.de
+
+- refresh patch lua51-5.1.5-module-path.diff
+- new patch lua51-5.1.5-pkgconfig.patch
+* fix libraries in pkgconfig file 
+
 -------------------------------------------------------------------
 Thu May 16 07:19:10 UTC 2013 - pgajdos@suse.com
 
diff --git a/lua51.spec b/lua51.spec
index c542f3b..a763b12 100644
--- a/lua51.spec
+++ b/lua51.spec
@@ -34,6 +34,7 @@ Source2:        baselibs.conf
 Patch0:         %{name}-%{version}-shared.diff
 Patch1:         %{name}-%{version}-module-path.diff
 Patch3:         %{name}-%{version}-libdir.diff
+Patch4:         %{name}-%{version}-pkgconfig.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
@@ -108,6 +109,7 @@ simplicity, efficiency, portability, and low embedding cost.
 %patch0 -b .shared
 %patch1 -p1
 %patch3 -p1
+%patch4 -p1
 
 %build
 sed -i 's:LUA_ROOT2 "LIBDIR/lua/%{major_version}/":LUA_ROOT2 \"%{_lib}/lua/%{major_version}/":' src/luaconf.h