diff --git a/BizHawk.Client.EmuHawk/CustomControls/Win32.cs b/BizHawk.Client.EmuHawk/CustomControls/Win32.cs
index 154d462ba8..dd11df172e 100644
--- a/BizHawk.Client.EmuHawk/CustomControls/Win32.cs
+++ b/BizHawk.Client.EmuHawk/CustomControls/Win32.cs
@@ -302,7 +302,7 @@ namespace BizHawk.Client.EmuHawk
 			out IntPtr ppavi,
 			ref AVISTREAMINFOW psi);
 
-		[StructLayout(LayoutKind.Sequential, Pack = 1)]
+		[StructLayout(LayoutKind.Sequential)]
 		public struct AVICOMPRESSOPTIONS
 		{
 			public int fccType;
@@ -573,4 +573,4 @@ namespace BizHawk.Client.EmuHawk
 		}
 	}
 
-}
\ No newline at end of file
+}