diff --git a/share/man/man9/atomic.9 b/share/man/man9/atomic.9
--- a/share/man/man9/atomic.9
+++ b/share/man/man9/atomic.9
@@ -480,10 +480,13 @@
 .Fn atomic_testandclear
 functions are only implemented for the types
 .Dq Li int ,
-.Dq Li long
+.Dq Li long ,
+.Dq Li 32 ,
 and
-.Dq Li 32
-and do not have any variants with memory barriers at this time.
+.Dq Li 64
+and generally do not have any variants with memory barriers at this time
+except for
+.Fn atomic_testandset_acq_long .
 .Pp
 The type
 .Dq Li 64