1 files changed, 4 insertions, 1 deletions
diff --git a/mdoc.3 b/mdoc.3
index 7bddf115..711ce654 100644
--- a/mdoc.3
+++ b/mdoc.3
@@ -59,7 +59,10 @@ library implements only those macros documented in the
 .Xr mdoc 7
 and
 .Xr mdoc.samples 7
-manuals.
+manuals.  Documents with 
+.Xr refer 1 ,
+.Xr eqn 1
+and other pre-processor sections aren't accomodated.
 .\" PARAGRAPH
 .Pp
 .Nm