diff --git a/th05_op.asm b/th05_op.asm
index 5d0574ca..57026859 100644
--- a/th05_op.asm
+++ b/th05_op.asm
@@ -19,7 +19,7 @@
 ; ===========================================================================
 
 ; Segment type:	Pure code
-seg000		segment	byte public 'CODE' use16 word
+seg000		segment	word public 'CODE' use16
 		assume cs:seg000
 		assume es:nothing, ss:seg005, ds:nothing, fs:nothing, gs:nothing