diff --git a/Documentation/redo.md b/Documentation/redo.md
index 30ba040..4e1fb3f 100644
--- a/Documentation/redo.md
+++ b/Documentation/redo.md
@@ -104,14 +104,6 @@ dependencies.
     output message.  This makes it easier to figure out
     which sub-instance of redo is doing what.
 
---old-args
-:   old versions of redo provided different definitions of
-    the $1 and $2 parameters to .do scripts.  The new
-    version is compatible with djb's original
-    specification.  This option goes back to the old
-    definitions so you can use .do scripts you haven't yet
-    converted to the new style.
-
 
 # DISCUSSION
 
diff --git a/builder.py b/builder.py
index 3dfe66f..c8197b7 100644
--- a/builder.py
+++ b/builder.py
@@ -141,12 +141,8 @@ class BuildJob:
         close_on_exec(ffd, True)
         self.f = os.fdopen(ffd, 'w+')
         # this will run in the dofile's directory, so use only basenames here
-        if vars.OLD_ARGS:
-            arg1 = basename  # target name (no extension)
-            arg2 = ext       # extension (if any), including leading dot
-        else:
-            arg1 = basename + ext  # target name (including extension)
-            arg2 = basename        # target name (without extension)
+        arg1 = basename + ext  # target name (including extension)
+        arg2 = basename        # target name (without extension)
         argv = ['sh', '-e',
                 dofile,
                 arg1,
diff --git a/redo.py b/redo.py
index d6a40fe..5265a6a 100755
--- a/redo.py
+++ b/redo.py
@@ -15,7 +15,6 @@ shuffle    randomize the build order to find dependency bugs
 debug-locks  print messages about file locking (useful for debugging)
 debug-pids   print process ids as part of log messages (useful for debugging)
 version    print the current version and exit
-old-args   use old-style definitions of $1,$2,$3 (deprecated)
 """
 o = options.Options(optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
@@ -40,8 +39,6 @@ if opt.debug_locks:
     os.environ['REDO_DEBUG_LOCKS'] = '1'
 if opt.debug_pids:
     os.environ['REDO_DEBUG_PIDS'] = '1'
-if opt.old_args:
-    os.environ['REDO_OLD_ARGS'] = '1'
 
 import vars_init
 vars_init.init(targets)
diff --git a/t/100-args/all.do b/t/100-args/all.do
index c408ecc..bcb13f5 100644
--- a/t/100-args/all.do
+++ b/t/100-args/all.do
@@ -1,3 +1,2 @@
 redo test.args test2.args passfailtest
 . ../skip-if-minimal-do.sh
-redo --old-args test.oldargs
diff --git a/t/100-args/default.oldargs.do b/t/100-args/default.oldargs.do
deleted file mode 100644
index 887cdd0..0000000
--- a/t/100-args/default.oldargs.do
+++ /dev/null
@@ -1,5 +0,0 @@
-# Note: this test expects to be run with 'redo --old-args' or it will fail.
-. ../skip-if-minimal-do.sh
-[ "$1" = "test" ]
-[ "$2" = ".oldargs" ]
-[ "$3" != "test.oldargs" ]
diff --git a/vars.py b/vars.py
index d81ca78..77156ee 100644
--- a/vars.py
+++ b/vars.py
@@ -13,7 +13,6 @@ DEPTH = os.environ.get('REDO_DEPTH', '')
 DEBUG = atoi(os.environ.get('REDO_DEBUG', ''))
 DEBUG_LOCKS = os.environ.get('REDO_DEBUG_LOCKS', '') and 1 or 0
 DEBUG_PIDS = os.environ.get('REDO_DEBUG_PIDS', '') and 1 or 0
-OLD_ARGS = os.environ.get('REDO_OLD_ARGS', '') and 1 or 0
 VERBOSE = os.environ.get('REDO_VERBOSE', '') and 1 or 0
 XTRACE = os.environ.get('REDO_XTRACE', '') and 1 or 0
 KEEP_GOING = os.environ.get('REDO_KEEP_GOING', '') and 1 or 0