diff --git a/OAR/contrib/build.rtems.4.12.sh b/OAR/contrib/build.rtems.4.12.sh
index 7e04984314ab7e9502a216feb8183ec791737ee4..6f8aba4949e32d04879b1c1b4bbc53f55a1b3a49 100755
--- a/OAR/contrib/build.rtems.4.12.sh
+++ b/OAR/contrib/build.rtems.4.12.sh
@@ -49,11 +49,15 @@ BUILD_LOG=~/rtems.build.logs/${DATE}.log
         git clone git://git.rtems.org/rtems-source-builder.git rtems-source-builder-${DATE}
     }
     cd $RSB
+
+    # Or whatever else you fancy - 4.11, etc
     git checkout -f 5ff2c0aa94a6fdb8b2b93fd7b16ea4284f6df5bf
 
     # Verify that we have all we need to build
     source-builder/sb-check
 
+    cd rtems
+
     # Your network firewall may or may not be an issue at this point:
     # Many of the source tarballs needed by the RSB are fetched over
     # PASV-enabled FTP servers.
@@ -62,8 +66,7 @@ BUILD_LOG=~/rtems.build.logs/${DATE}.log
     # (so no FTP action is triggered by the RTEMS RSB builder).
     #
     # This is one way to do it - adapt it according to your needs:
-    #
-    # cd rtems
+
     # [ ! -d sources ] && {
     #     mkdir -p sources
     #     cd sources
@@ -85,7 +88,9 @@ BUILD_LOG=~/rtems.build.logs/${DATE}.log
         git clone https://github.com/RTEMS/rtems.git rtems-git
     }
     cd rtems-git
-    git checkout -f c6556e2ecc6b80f981bb210d541544f24b7f59df
+
+    # Or whatever else you fancy - 4.11, etc
+    git checkout -f 271690eb8838f2af30593584a87cb7595bdbdc6b
     ./bootstrap
     cd ..
     rm -rf build.${DATE}