diff --git a/src/c-api.adoc b/src/c-api.adoc
index ce7e414..9e6744b 100644
--- a/src/c-api.adoc
+++ b/src/c-api.adoc
@@ -949,6 +949,8 @@ Each queryable extension must have an associated `groupid` and `bitmask` that in
 | zilsd | 1 | 8
 | zclsd | 1 | 9
 | zcmp | 1 | 10
+| zifencei | 1 | 11
+| zmmul | 1 | 12
 |====
 
 === Version Selection