diff --git a/src/Compiler/Service/service.fs b/src/Compiler/Service/service.fs
index f4ecaad9355..615b7458691 100644
--- a/src/Compiler/Service/service.fs
+++ b/src/Compiler/Service/service.fs
@@ -1244,7 +1244,12 @@ type BackgroundCompiler
 
         lock gate (fun () ->
             options
-            |> Seq.iter (fun options -> incrementalBuildersCache.RemoveAnySimilar(AnyCallerThread, options)))
+            |> Seq.iter (fun options ->
+                incrementalBuildersCache.RemoveAnySimilar(AnyCallerThread, options)
+
+                parseCacheLock.AcquireLock(fun ltok ->
+                    for sourceFile in options.SourceFiles do
+                        checkFileInProjectCache.RemoveAnySimilar(ltok, (sourceFile, 0L, options)))))
 
     member _.NotifyProjectCleaned(options: FSharpProjectOptions, userOpName) =
         use _ =