diff --git a/.gitignore b/.gitignore
index 3634652..516cd44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 ncl_ncarg_src-5.2.0.tar.gz
+ncl_ncarg_src-5.2.1.tar.gz
diff --git a/ncl-5.0.0-udunits.patch b/ncl-5.2.1-udunits.patch
similarity index 50%
rename from ncl-5.0.0-udunits.patch
rename to ncl-5.2.1-udunits.patch
index 3bb1304..c849918 100644
--- a/ncl-5.0.0-udunits.patch
+++ b/ncl-5.2.1-udunits.patch
@@ -1,10 +1,11 @@
---- ncl_ncarg-5.0.0/config/Project.udunits	2008-12-08 15:35:46.000000000 -0700
-+++ ncl_ncarg-5.0.0/config/Project	2008-12-08 15:50:44.000000000 -0700
-@@ -328,7 +328,7 @@
+diff -up ncl_ncarg-5.2.1/config/Project.udunits ncl_ncarg-5.2.1/config/Project
+--- ncl_ncarg-5.2.1/config/Project.udunits	2010-08-10 13:01:03.000000000 -0600
++++ ncl_ncarg-5.2.1/config/Project	2010-08-10 13:02:36.052660865 -0600
+@@ -392,7 +392,7 @@ NGENV_DESCRIPT	= \
  		"graphcaps",NULL,"ncarg",NULL,NULL,		\
  		"colormaps",NULL,"ncarg",NULL,NULL,		\
  		"rangs","NCARG_RANGS","database",NULL,NULL,	\
--		"udunits","UDUNITS_PATH","ncarg",NULL,NULL,	\
+-		"udunits","NCARG_UDUNITS","ncarg",NULL,NULL,	\
 +		"udunits","UDUNITS_PATH",NULL,"/etc","udunits.dat",	\
  		"psadilookup","PSADILOOKUP_PATH",NULL,NULL,NULL,\
  		"examples",NULL,"ncarg",NULL,NULL,		\
diff --git a/ncl.spec b/ncl.spec
index c78dc2e..507c587 100644
--- a/ncl.spec
+++ b/ncl.spec
@@ -1,6 +1,6 @@
 Name:           ncl
-Version:        5.2.0
-Release:        2%{?dist}
+Version:        5.2.1
+Release:        1%{?dist}
 Summary:        NCAR Command Language and NCAR Graphics
 
 Group:          Applications/Engineering
@@ -41,7 +41,7 @@ Patch11:        ncl-5.0.0-build_n_scripts.patch
 Patch12:        ncl-5.1.0-netcdff.patch
 Patch13:        ncl-5.1.0-includes.patch
 # Use /etc/udunits.dat
-Patch15:        ncl-5.0.0-udunits.patch
+Patch15:        ncl-5.2.1-udunits.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildRequires:  /bin/csh, gcc-gfortran, netcdf-devel
@@ -310,6 +310,10 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Tue Aug 10 2010 - Orion Poplawski <orion@cora.nwra.com> - 5.2.1-1
+- Update to 5.2.1
+- Update udunits patch
+
 * Thu Jul 1 2010 - Orion Poplawski <orion@cora.nwra.com> - 5.2.0-2
 - Drop BR libnc-dap and update lib patch to remove unneeded libraries
 
diff --git a/sources b/sources
index e77a34c..69149cd 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-7ed710647a7eec8f500c7494853a2b65  ncl_ncarg_src-5.2.0.tar.gz
+c7ba4847961f38bbbac30ac042eab43a  ncl_ncarg_src-5.2.1.tar.gz