diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 00cfe19..5862f67 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -833,6 +833,10 @@
   CPU. This needs to be enabled only for revisions r0p0, r1p0 and r1p1 of the
   CPU. It is fixed in r1p2.
 
+- ``ERRATA_X3_3701769``: This applies errata 3701769 workaround to Cortex-X3
+  CPU. This needs to be enabled only for revisions r0p0, r1p0, r1p1 and r1p2
+  of the CPU and it is still open.
+
 For Cortex-X4, the following errata build flags are defined :
 
 - ``ERRATA_X4_2701112``: This applies erratum 2701112 workaround to Cortex-X4