diff --git a/Assets/dll/encore.dll b/Assets/dll/encore.dll
index 25eb5482d4..9a53da9b73 100644
Binary files a/Assets/dll/encore.dll and b/Assets/dll/encore.dll differ
diff --git a/encore/encore b/encore/encore
index c3e7f204c1..dcc66239fa 160000
--- a/encore/encore
+++ b/encore/encore
@@ -1 +1 @@
-Subproject commit c3e7f204c1a0a2da62b280ef0a846d0264097b2a
+Subproject commit dcc66239fafafbf596436758b714798e0960c507
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/3DS/Encore.ISettable.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/3DS/Encore.ISettable.cs
index 7794dbc31c..a4b9a5e0ed 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/3DS/Encore.ISettable.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/3DS/Encore.ISettable.cs
@@ -26,7 +26,6 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.N3DS
 			"use_virtual_sd" => _syncSettings.UseVirtualSd,
 			"is_new_3ds" => _syncSettings.IsNew3ds,
 			"lle_applets" => _syncSettings.LleApplets,
-			"allow_async_file_io" => !DeterministicEmulation && _syncSettings.AllowAsyncFileIo,
 			"plugin_loader" => _syncSettings.PluginLoaderEnabled,
 			"allow_plugin_loader" => _syncSettings.AllowPluginLoader,
 			"want_determinism" => DeterministicEmulation,
@@ -333,11 +332,6 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.N3DS
 			[DefaultValue(false)]
 			public bool LleApplets { get; set; }
 
-			[DisplayName("Allow Async File I/O")]
-			[Description("If true, file i/o may be performed asynchronously. May reduce stutters for slow HDDs, but may result in longer load times. Ignored (set to false) when recording a movie.")]
-			[DefaultValue(true)]
-			public bool AllowAsyncFileIo { get; set; }
-
 			public enum ERegionValue
 			{
 				Autodetect = -1,