--- classes/module-base.bbclass 2011-02-17 16:14:45.792425264 +0300
+++ classes/module-base.bbclass 2011-02-17 16:36:00.088425246 +0300
@@ -11,7 +11,8 @@
     machine_kernel_pr = bb.data.getVar('MACHINE_KERNEL_PR', d, True)

     if machine_kernel_pr:
-       bb.data.setVar('PR', machine_kernel_pr, d)
+       pr = bb.data.getVar('PR', d, True) + "+k" + machine_kernel_pr
+       bb.data.setVar('PR', pr, d)
 }

 export KERNEL_VERSION = "${@base_read_file('${STAGING_KERNEL_DIR}/kernel-abiversion')}"