diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index 1ffd2915e8..7f18943d92 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -1343,7 +1343,7 @@ namespace BizHawk.MultiClient
 			if (path == null) return false;
 			using (var file = new HawkFile())
 			{
-				string[] romExtensions = new string[] { "SMS", "SMC", "SFC", "PCE", "SGX", "GG", "SG", "BIN", "GEN", "MD", "SMD", "GB", "NES", "ROM", "INT", "GBC", "UNF", "A78" };
+				string[] romExtensions = new string[] { "SMS", "SMC", "SFC", "PCE", "SGX", "GG", "SG", "BIN", "GEN", "MD", "SMD", "GB", "NES", "FDS", "ROM", "INT", "GBC", "UNF", "A78" };
 
 				//lets not use this unless we need to
 				//file.NonArchiveExtensions = romExtensions;