diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 9978202..9c55077 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -744,6 +744,10 @@
 -  ``ERRATA_X2_1901946``: This applies errata 1901946 workaround to Cortex-X2
    CPU. This needs to be enabled only for r1p0, it is fixed in r2p0.
 
+-  ``ERRATA_X2_1916945``: This applies errata 1916945 workaround to Cortex-X2
+   CPU. This needs to be enabled for revisions r0p0 and r1p0, it is fixed in
+   r2p0.
+
 -  ``ERRATA_X2_2002765``: This applies errata 2002765 workaround to Cortex-X2
    CPU. This needs to be enabled for revisions r0p0, r1p0, and r2p0 of the CPU,
    it is still open.