diff --git a/src/lime/ui/FileDialog.hx b/src/lime/ui/FileDialog.hx
index 61201b9fb..d5bc70d99 100644
--- a/src/lime/ui/FileDialog.hx
+++ b/src/lime/ui/FileDialog.hx
@@ -99,7 +99,7 @@ class FileDialog
 		if (type == null) type = FileDialogType.OPEN;
 
 		#if desktop
-		var worker = new ThreadPool();
+		var worker = new ThreadPool(#if (windows && hl) SINGLE_THREADED #end);
 
 		worker.onComplete.add(function(result)
 		{
@@ -224,7 +224,7 @@ class FileDialog
 	public function open(filter:String = null, defaultPath:String = null, title:String = null):Bool
 	{
 		#if (desktop && sys)
-		var worker = new ThreadPool();
+		var worker = new ThreadPool(#if (windows && hl) SINGLE_THREADED #end);
 
 		worker.onComplete.add(function(path:String)
 		{
@@ -287,7 +287,7 @@ class FileDialog
 		}
 
 		#if (desktop && sys)
-		var worker = new ThreadPool();
+		var worker = new ThreadPool(#if (windows && hl) SINGLE_THREADED #end);
 
 		worker.onComplete.add(function(path:String)
 		{