diff --git a/collects/mzlib/private/contract-arr-obj-helpers.ss b/collects/mzlib/private/contract-arr-obj-helpers.ss
index 52d4d6a099..8c4b904c98 100644
--- a/collects/mzlib/private/contract-arr-obj-helpers.ss
+++ b/collects/mzlib/private/contract-arr-obj-helpers.ss
@@ -1,8 +1,5 @@
 (module contract-arr-obj-helpers mzscheme
-  (require "contract-opt-guts.ss"
-           "contract-helpers.ss"
-           (lib "list.ss")
-           (lib "stx.ss" "syntax")
+  (require (lib "stx.ss" "syntax")
            (lib "name.ss" "syntax"))
   
   (require-for-template mzscheme
diff --git a/collects/mzlib/private/contract-arrow.ss b/collects/mzlib/private/contract-arrow.ss
index f805ff1b4a..7dbfeadbe2 100644
--- a/collects/mzlib/private/contract-arrow.ss
+++ b/collects/mzlib/private/contract-arrow.ss
@@ -1,14 +1,11 @@
 (module contract-arrow mzscheme
   (require (lib "etc.ss")
-           (lib "list.ss")
            "contract-guts.ss"
            "contract-arr-checks.ss"
-           "contract-opt.ss"
-           "contract-opt-guts.ss")
+           "contract-opt.ss")
   (require-for-syntax "contract-opt-guts.ss"
                       "contract-helpers.ss"
                       "contract-arr-obj-helpers.ss"
-                      (lib "list.ss")
                       (lib "stx.ss" "syntax")
                       (lib "name.ss" "syntax"))
 
diff --git a/collects/mzlib/private/contract-guts.ss b/collects/mzlib/private/contract-guts.ss
index 06f774a4cf..62dc738c43 100644
--- a/collects/mzlib/private/contract-guts.ss
+++ b/collects/mzlib/private/contract-guts.ss
@@ -1,7 +1,6 @@
 (module contract-guts mzscheme
   (require "contract-helpers.ss"
-           (lib "pretty.ss")
-           (lib "list.ss"))
+           (lib "pretty.ss"))
 
   (require-for-syntax "contract-helpers.ss")
   
diff --git a/collects/mzlib/private/contract-object.ss b/collects/mzlib/private/contract-object.ss
index 62c84bbc7d..4d670d7691 100644
--- a/collects/mzlib/private/contract-object.ss
+++ b/collects/mzlib/private/contract-object.ss
@@ -1,19 +1,13 @@
 (module contract-object mzscheme
   (require (lib "etc.ss")
-           (lib "list.ss")
            "contract-arrow.ss"
            "contract-guts.ss"
-           "contract-opt.ss"
-           "contract-opt-guts.ss"
            "class-internal.ss"
            "contract-arr-checks.ss")
   
-  (require-for-syntax "contract-opt-guts.ss"
-                      "contract-helpers.ss"
+  (require-for-syntax "contract-helpers.ss"
                       "contract-arr-obj-helpers.ss"
-                      (lib "list.ss")
-                      (lib "stx.ss" "syntax")
-                      (lib "name.ss" "syntax"))
+                      (lib "list.ss"))
   
   (provide mixin-contract
            make-mixin-contract
diff --git a/collects/mzlib/private/contract-opt-guts.ss b/collects/mzlib/private/contract-opt-guts.ss
index d20b882177..dd3548593f 100644
--- a/collects/mzlib/private/contract-opt-guts.ss
+++ b/collects/mzlib/private/contract-opt-guts.ss
@@ -1,7 +1,6 @@
 (module contract-opt-guts mzscheme
   (require (lib "private/boundmap.ss" "syntax")
-           (lib "list.ss")
-           "contract-guts.ss")
+           (lib "list.ss"))
   (require-for-template mzscheme)
   
   (provide get-opter reg-opter! opter
diff --git a/collects/mzlib/private/contract.ss b/collects/mzlib/private/contract.ss
index 39dcb1b9a1..a7a24830af 100644
--- a/collects/mzlib/private/contract.ss
+++ b/collects/mzlib/private/contract.ss
@@ -15,17 +15,11 @@ improve method arity mismatch contract violation error messages?
   (require-for-syntax mzscheme
                       "contract-opt-guts.ss"
                       (lib "list.ss")
-                      (lib "stx.ss" "syntax")
-                      (lib "etc.ss")
-                      (lib "name.ss" "syntax"))
+                      (lib "etc.ss"))
   
-  (require (lib "etc.ss")
-           (lib "list.ss")
-           (lib "pretty.ss")
-           "contract-arrow.ss"
+  (require "contract-arrow.ss"
            "contract-guts.ss"
-           "contract-opt.ss"
-           "contract-opt-guts.ss")
+           "contract-opt.ss")
   
   (require "contract-helpers.ss")
   (require-for-syntax (prefix a: "contract-helpers.ss"))