diff --git a/src/FSharp.Formatting.ApiDocs/GenerateModel.fs b/src/FSharp.Formatting.ApiDocs/GenerateModel.fs
index 9b406e67..218f64d4 100644
--- a/src/FSharp.Formatting.ApiDocs/GenerateModel.fs
+++ b/src/FSharp.Formatting.ApiDocs/GenerateModel.fs
@@ -346,10 +346,19 @@ type ApiDocMember
                         m.StartColumn
                         pn
 
-            for (_psym, pnm, _pn, _pty) in paramTypes do
+            for (psym, pnm, _pn, _pty) in paramTypes do
                 match pnm with
                 | None ->
-                    printfn "%s(%d,%d): warning: a parameter was missing a name" m.FileName m.StartLine m.StartColumn
+                    match psym with
+                    | Choice1Of2 p ->
+                        if isUnitType p.Type |> not then
+                            printfn
+                                "%s(%d,%d): warning: a parameter was missing a name"
+                                m.FileName
+                                m.StartLine
+                                m.StartColumn
+                    | Choice2Of2 _ ->
+                        printfn "%s(%d,%d): warning: a field was missing a name" m.FileName m.StartLine m.StartColumn
                 | Some nm ->
                     if not (tdocs.ContainsKey pnm) then
                         printfn