diff --git a/.gitignore b/.gitignore
index 03645a3..ba2af6a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ bullet-2.75-free.tar.gz
 /bullet-2.78-free.tar.gz
 /bullet-2.79-free.tar.gz
 /bullet-2.80-rev2531-free.tar.gz
+/bullet-2.81-rev2613-free.tar.gz
diff --git a/bullet.spec b/bullet.spec
index 5ad7807..93b807e 100644
--- a/bullet.spec
+++ b/bullet.spec
@@ -1,17 +1,19 @@
+%global svnrev 2613
+
 Name: bullet
-Version: 2.80
-Release: 2%{?dist}
+Version: 2.81
+Release: 1%{?dist}
 Summary: 3D Collision Detection and Rigid Body Dynamics Library
 Group: Development/Libraries
 License: zlib and MIT and BSD
 URL: http://www.bulletphysics.com
 
-Source0: %{name}-%{version}-rev2531-free.tar.gz
+Source0: %{name}-%{version}-rev%{svnrev}-free.tar.gz
 # bullet contains non-free code that we cannot ship.  Therefore we use
 # this script to remove the non-free code before shipping it.
 # Download the upstream tarball and invoke this script while in the
 # tarball's directory:
-# ./generate-tarball.sh 2.77
+# ./generate-tarball.sh 2.81-rev2613
 Source1: generate-tarball.sh
 
 Patch0: %{name}-2.77-extras-version.patch
@@ -58,7 +60,7 @@ Development headers and libraries for %{name} extra libraries.
 
 
 %prep
-%setup -q -n %{name}-%{version}-rev2531
+%setup -q -n %{name}-%{version}-rev%{svnrev}
 %patch0 -p1 -b .extras-version
 
 # Set these files to right permission
@@ -155,6 +157,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Sat Oct 13 2012 Rich Mattes <richmattes@gmail.com> - 2.81-1
+- Update to version 2.81
+
 * Wed Jul 18 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.80-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
 
diff --git a/generate-tarball.sh b/generate-tarball.sh
index f8640cb..3d35919 100644
--- a/generate-tarball.sh
+++ b/generate-tarball.sh
@@ -13,6 +13,7 @@ rm -f $NAME-$VERSION/*.{DLL,dll}
 rm -rf $NAME-$VERSION/Demos
 rm -rf $NAME-$VERSION/Extras/{CUDA,khx2dae,software_cache,sph,CDTestFramework}
 rm -rf $NAME-$VERSION/Glut
+rm -rf $NAME-$VERSION/build
 
 tar -czvf $NAME-$VERSION-free.tar.gz $NAME-$VERSION
 
diff --git a/sources b/sources
index d65f642..f9d86fb 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-3e12ddcd4973ad90f1423457db2956c0  bullet-2.80-rev2531-free.tar.gz
+45994417b55b07e62999e74972f8bdec  bullet-2.81-rev2613-free.tar.gz