--- a/src/edu/isi/pegasus/planner/refiner/DeployWorkerPackage.java
+++ b/src/edu/isi/pegasus/planner/refiner/DeployWorkerPackage.java
@@ -256,7 +256,7 @@
         //singleton access
         if( mOSToNMIOSReleaseAndVersion == null ){
             mOSToNMIOSReleaseAndVersion = new HashMap();
-            mOSToNMIOSReleaseAndVersion.put( SysInfo.OS.LINUX, "rhel_5" );
+            mOSToNMIOSReleaseAndVersion.put( SysInfo.OS.LINUX, "deb_7" );
             mOSToNMIOSReleaseAndVersion.put( SysInfo.OS.MACOSX, "macos_10.7" );
         }
         return mOSToNMIOSReleaseAndVersion;
