diff --git a/docs/release-notes/.VisualStudio/18.vNext.md b/docs/release-notes/.VisualStudio/18.vNext.md
index ba03f663967..be1b6daab13 100644
--- a/docs/release-notes/.VisualStudio/18.vNext.md
+++ b/docs/release-notes/.VisualStudio/18.vNext.md
@@ -15,6 +15,7 @@
 * Fix doubled F# diagnostics in tooltips. ([Issue #16360](https://github.com/dotnet/fsharp/issues/16360))
 * Fix `NotSupportedException` in the memory-mapped-file optimization when copying `ReadOnlyMemory` into `MemoryMappedFileViewStream`. ([Issue #20263](https://github.com/dotnet/fsharp/issues/20263))
 * Reduce allocations in the VS project options reactor: the command-line options and project options caches and the mailbox reply payloads now hold struct tuples, and `IProjectSite.CompilationBinOutputPath` returns `string voption` picked with a new `Array.tryPickV`. ([PR #20413](https://github.com/dotnet/fsharp/pull/20413))
+* Build a single-file project's `OtherOptions` reference flags with one array comprehension instead of two `Array.ofSeq` calls and an `Array.append`. ([PR #20499](https://github.com/dotnet/fsharp/pull/20499))
 
 ### Changed
 
diff --git a/vsintegration/src/FSharp.Editor/LanguageService/FSharpProjectOptionsManager.fs b/vsintegration/src/FSharp.Editor/LanguageService/FSharpProjectOptionsManager.fs
index 7cd53631893..db73206996b 100644
--- a/vsintegration/src/FSharp.Editor/LanguageService/FSharpProjectOptionsManager.fs
+++ b/vsintegration/src/FSharp.Editor/LanguageService/FSharpProjectOptionsManager.fs
@@ -238,14 +238,12 @@ type private FSharpProjectOptionsReactor(checker: FSharpChecker) =
 
                 let otherOptions =
                     if project.IsFSharpMetadata then
-                        project.ProjectReferences
-                        |> Seq.map (fun x -> "-r:" + project.Solution.GetProject(x.ProjectId).OutputFilePath)
-                        |> Array.ofSeq
-                        |> Array.append (
-                            project.MetadataReferences.OfType<PortableExecutableReference>()
-                            |> Seq.map (fun x -> "-r:" + x.FilePath)
-                            |> Array.ofSeq
-                        )
+                        [|
+                            for x in project.MetadataReferences.OfType<PortableExecutableReference>() do
+                                yield "-r:" + x.FilePath
+                            for x in project.ProjectReferences do
+                                yield "-r:" + project.Solution.GetProject(x.ProjectId).OutputFilePath
+                        |]
                     else
                         [||]