diff --git a/src/level-ext.adoc b/src/level-ext.adoc
index c3312e94..a2f1dfb7 100644
--- a/src/level-ext.adoc
+++ b/src/level-ext.adoc
@@ -100,7 +100,7 @@ endif::[]
 |==============================================================================
 
 ^1^ _Mode (<<m_bit>>) can only be set on a tagged capability when {cheri_default_ext_name}
-is supported. Despite being encoded here it is *not* an architectural permission._ +
+is supported, otherwise such encodings are reserved. Despite being encoded here it is *not* an architectural permission._ +
 ^2^ SL isn't applicable in these cases, but this value is reported by <<GCPERM>> to simplify the rules followed by <<ACPERM>> +
 ^3^ These entries are reserved when `LVLBITS=1` and in use when `LVLBITS=2`