diff --git a/meta-oe/classes/machine_kernel_pr.bbclass b/meta-oe/classes/machine_kernel_pr.bbclass
new file mode 100644
index 0000000..463b64d
--- /dev/null
+++ b/meta-oe/classes/machine_kernel_pr.bbclass
@@ -0,0 +1,8 @@
+python __anonymous () {
+
+    machine_kernel_pr = d.getVar('MACHINE_KERNEL_PR', True)
+
+    if machine_kernel_pr:
+        d.setVar('PR', machine_kernel_pr)
+}
+