diff --git a/openpower/package/openpower-pnor/openpower-pnor.mk b/openpower/package/openpower-pnor/openpower-pnor.mk
index c9e73fe..d6a9472 100644
--- a/openpower/package/openpower-pnor/openpower-pnor.mk
+++ b/openpower/package/openpower-pnor/openpower-pnor.mk
@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-OPENPOWER_PNOR_VERSION = 0855f1b9683e13583248a64454fe13fb02fd1b87
-OPENPOWER_PNOR_SITE = $(call github,open-power,pnor,$(OPENPOWER_PNOR_VERSION))
+OPENPOWER_PNOR_VERSION ?= 0855f1b9683e13583248a64454fe13fb02fd1b87
+OPENPOWER_PNOR_SITE ?= $(call github,open-power,pnor,$(OPENPOWER_PNOR_VERSION))
 OPENPOWER_PNOR_LICENSE = Apache-2.0
 OPENPOWER_PNOR_DEPENDENCIES = hostboot hostboot-binaries openpower-targeting skiboot host-openpower-ffs