diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index e0fc1f7..584682e 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -433,6 +433,10 @@
 # to revision r0p0 of the Neoverse N2 cpu and is still open.
 ERRATA_N2_2189731	?=0
 
+# Flag to apply erratum 2138956 workaround during reset. This erratum applies
+# to revision r0p0 of the Neoverse N2 cpu and is still open.
+ERRATA_N2_2138956	?=0
+
 # Flag to apply erratum 2055002 workaround during reset. This erratum applies
 # to revision r1p0, r2p0 of the Cortex-A710 cpu and is still open.
 ERRATA_A710_2055002	?=0
@@ -806,6 +810,10 @@
 $(eval $(call assert_boolean,ERRATA_N2_2189731))
 $(eval $(call add_define,ERRATA_N2_2189731))
 
+# Process ERRATA_N2_2138956 flag
+$(eval $(call assert_boolean,ERRATA_N2_2138956))
+$(eval $(call add_define,ERRATA_N2_2138956))
+
 # Process ERRATA_A710_2055002 flag
 $(eval $(call assert_boolean,ERRATA_A710_2055002))
 $(eval $(call add_define,ERRATA_A710_2055002))