diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 50d0250b1e..47f5123a31 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -94,6 +94,7 @@ the following architecture extensions:
 - FEAT_MTE2 (Memory Tagging Extension)
 - FEAT_MTE3 (MTE Asymmetric Fault Handling)
 - FEAT_MTE_ASYM_FAULT (Memory tagging asymmetric faults)
+- FEAT_MTE_ASYNC (Asynchronous reporting of Tag Check Fault)
 - FEAT_NMI (Non-maskable Interrupt)
 - FEAT_NV (Nested Virtualization)
 - FEAT_NV2 (Enhanced nested virtualization support)