diff --git a/doc/asm/usage.htm b/doc/asm/usage.htm
index 73f6420a..b1fce026 100644
--- a/doc/asm/usage.htm
+++ b/doc/asm/usage.htm
@@ -23,7 +23,7 @@ Options are preceded by a dash (-) and go as follows:<BR>
     g<B>ASCI</B>       : Change the four characters used for Gameboy graphics
                   constants (default is <B>0123</B>)
     b<B>AS</B>         : Change the two characters used for binary constants
-                  (default is <B>0123</B>)
+                  (default is <B>01</B>)
     z<B>HX</B>         : Set the byte value (hex format) used for uninitialised data (default is ? for random)
 </PRE>