diff --git a/BizHawk.Emulation.Common/Base Implementations/MemoryDomainImpls.cs b/BizHawk.Emulation.Common/Base Implementations/MemoryDomainImpls.cs
index 67a150220f..d660cc4f9d 100644
--- a/BizHawk.Emulation.Common/Base Implementations/MemoryDomainImpls.cs	
+++ b/BizHawk.Emulation.Common/Base Implementations/MemoryDomainImpls.cs	
@@ -32,6 +32,7 @@ namespace BizHawk.Emulation.Common
 			_peek = peek;
 			_poke = poke;
 			Writable = poke != null;
+			WordSize = wordSize;
 		}
 	}