diff --git a/src/BizHawk.Emulation.Cores/CPUs/W65816/Disassembler.cs b/src/BizHawk.Emulation.Cores/CPUs/W65816/Disassembler.cs
index 80b9f04854..ee1c760b0c 100644
--- a/src/BizHawk.Emulation.Cores/CPUs/W65816/Disassembler.cs
+++ b/src/BizHawk.Emulation.Cores/CPUs/W65816/Disassembler.cs
@@ -44,7 +44,7 @@ namespace BizHawk.Emulation.Cores.Components.W65816
 		public string Disassemble(uint addr, Func<long, byte> peek, ref byte P, out int length)
 		{
 			byte opcode = peek(addr);
-			string ibuf;
+			string ibuf = null;
 			string pbuf;
 			int offset = -1, sval = -1;