diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index e49c73e..07983a9 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -143,6 +143,9 @@
 -  ``ERRATA_A55_903758``: This applies errata 903758 workaround to Cortex-A55
    CPU. This needs to be enabled only for revision <= r0p1 of the CPU.
 
+-  ``ERRATA_A55_1221012``: This applies errata 1221012 workaround to Cortex-A55
+   CPU. This needs to be enabled only for revision <= r1p0 of the CPU.
+
 For Cortex-A57, the following errata build flags are defined :
 
 -  ``ERRATA_A57_806969``: This applies errata 806969 workaround to Cortex-A57