diff --git a/main/external/fsharpbinding/MonoDevelop.FSharpBinding/FSharpSymbolHelper.fs b/main/external/fsharpbinding/MonoDevelop.FSharpBinding/FSharpSymbolHelper.fs
index e3c2e5e4c54..df70a0a729a 100644
--- a/main/external/fsharpbinding/MonoDevelop.FSharpBinding/FSharpSymbolHelper.fs
+++ b/main/external/fsharpbinding/MonoDevelop.FSharpBinding/FSharpSymbolHelper.fs
@@ -375,11 +375,16 @@ module Highlight =
         |> Async.AwaitTask 
         |> Async.RunSynchronously
 
-    let syntaxHighlight s =
-        Runtime.RunInMainThread(fun() -> editor.Text <- s) |> Async.AwaitTask |> Async.RunSynchronously
+    let getHighlightedMarkup s =
+        editor.Text <- s
         let data = editor.GetContent<ITextEditorDataProvider>().GetTextEditorData()
         data.GetMarkup(0, s.Length, false, true, false, true)
 
+    let syntaxHighlight s =
+        Runtime.RunInMainThread (fun () -> getHighlightedMarkup s)
+        |> Async.AwaitTask
+        |> Async.RunSynchronously
+
     let asUnderline = sprintf "_STARTUNDERLINE_%s_ENDUNDERLINE_" // we replace with real markup after highlighting
 
 module SymbolTooltips =