diff --git a/as/k-as.py b/as/k-as.py
index c9d971d..1e34dad 100755
--- a/as/k-as.py
+++ b/as/k-as.py
@@ -158,47 +158,6 @@ def parse_preproc(line):
 
 #-------------------------------------------------------------------------------
 
-def apply_pdefs(line):
-    return line
-"""
-    tok = line.split(' ', 1)
-    
-    instr = tok[0]
-    
-    new = '' + tok[0]
-
-    for word in tok[1:]:
-        word = word.strip()
-        new += ' '
-
-        print(word)
-        if '[' in word:
-            assert(len(word) > 2)
-            assert(word[-1] == ']')
-            assert(word[1:].strip()[0] == '[')
-            new += word[0] + '['
-            word = word[1:-1]
-            need_bracket = True
-        else:
-            need_bracket = False
-
-        if word in pdefs:
-            word = pdefs[word]
-
-        if not name_valid(word):
-            print("Invalid token in line: {}".format(line))
-            leave()
-            sys.exit(1)
-            return None
-
-        new += word
-
-        if need_bracket:
-            new += ']'
-
-    return new
-"""
-
 def parse():
     global ptext
     global plastlabel
@@ -219,8 +178,6 @@ def parse():
 
         if line[0] == ' ' or line[0] == '\t':
             line = line.lstrip()
-
-            line = apply_pdefs(line)
             ptext += parse_instr(line)
             instrs.write("\n")
 
diff --git a/os/dos.k b/os/dos.k
index c9a4a8a..fe57439 100644
--- a/os/dos.k
+++ b/os/dos.k
@@ -29,7 +29,7 @@ print:
     mov rcx, v_print_max
 
 .1:
-    test b[ax0], b [ ax0 + 0 ]
+    test b[ax0], b[ax0]
     jz .2
     prn b[ax0]
     inc ax0