diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 2ada0be..ee316b7 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -83,6 +83,10 @@
 # only to revision r0p0 of the Cortex A55 cpu.
 ERRATA_A55_768277	?=0
 
+# Flag to apply erratum 778703 workaround during reset. This erratum applies
+# only to revision r0p0 of the Cortex A55 cpu.
+ERRATA_A55_778703	?=0
+
 # Flag to apply erratum 806969 workaround during reset. This erratum applies
 # only to revision r0p0 of the Cortex A57 cpu.
 ERRATA_A57_806969	?=0
@@ -156,6 +160,10 @@
 $(eval $(call assert_boolean,ERRATA_A55_768277))
 $(eval $(call add_define,ERRATA_A55_768277))
 
+# Process ERRATA_A55_778703 flag
+$(eval $(call assert_boolean,ERRATA_A55_778703))
+$(eval $(call add_define,ERRATA_A55_778703))
+
 # Process ERRATA_A57_806969 flag
 $(eval $(call assert_boolean,ERRATA_A57_806969))
 $(eval $(call add_define,ERRATA_A57_806969))