diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 07e7821..2e3fe74 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -325,6 +325,12 @@
   Cortex-A78 AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This
   erratum is still open.
 
+For Cortex-A78C, the following errata build flags are defined :
+
+- ``ERRATA_A78C_2132064`` : This applies errata 2132064 workaround to
+  Cortex-A78C CPU. This needs to be enabled for revisions r0p1, r0p2 and
+  it is still open.
+
 For Cortex-X1 CPU, the following errata build flags are defined:
 
 - ``ERRATA_X1_1821534`` : This applies errata 1821534 workaround to Cortex-X1