diff --git a/collects/framework/gui-utils.ss b/collects/framework/gui-utils.ss
index f0229cdc..03f4c7c6 100644
--- a/collects/framework/gui-utils.ss
+++ b/collects/framework/gui-utils.ss
@@ -1,7 +1,14 @@
-(require-library "refer.ss")
-(require-library "guiutilss.ss" "framework")
-(define-values/invoke-unit/sig 
- framework:gui-utils^
- (require-library "guiutilsr.ss" "framework")
- gui-utils
- mred^)
+(module gui-utils mzscheme
+  (require (lib "unitsig.ss")
+	   "gui-utils-sig.ss"
+	   "gui-utils-unit.ss"
+	   (lib "mred-sig.ss" "mred")
+	   (lib "mred.ss" "mred"))
+
+  (provide-signature-elements framework:gui-utils^)
+
+  (define-values/invoke-unit/sig 
+    framework:gui-utils^
+    gui-utils@
+    #f
+    mred^))
diff --git a/collects/framework/private/autosave.ss b/collects/framework/private/autosave.ss
index 689e43d6..fbff0f0f 100644
--- a/collects/framework/private/autosave.ss
+++ b/collects/framework/private/autosave.ss
@@ -1,5 +1,6 @@
 (module autosave mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/canvas.ss b/collects/framework/private/canvas.ss
index 6895e272..74affbd7 100644
--- a/collects/framework/private/canvas.ss
+++ b/collects/framework/private/canvas.ss
@@ -1,5 +1,6 @@
 (module canvas mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/color-model.ss b/collects/framework/private/color-model.ss
index e6f61db3..8c3be1db 100644
--- a/collects/framework/private/color-model.ss
+++ b/collects/framework/private/color-model.ss
@@ -1,5 +1,6 @@
 (module color-model mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "list.ss"))
diff --git a/collects/framework/private/editor.ss b/collects/framework/private/editor.ss
index ad12c3f0..cda83dbd 100644
--- a/collects/framework/private/editor.ss
+++ b/collects/framework/private/editor.ss
@@ -1,5 +1,6 @@
 (module editor mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")
diff --git a/collects/framework/private/exit.ss b/collects/framework/private/exit.ss
index 98e249a7..2a26040c 100644
--- a/collects/framework/private/exit.ss
+++ b/collects/framework/private/exit.ss
@@ -1,5 +1,6 @@
 (module exit mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")
diff --git a/collects/framework/private/finder.ss b/collects/framework/private/finder.ss
index 703e8e12..3250e795 100644
--- a/collects/framework/private/finder.ss
+++ b/collects/framework/private/finder.ss
@@ -1,5 +1,6 @@
 (module finder mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")
diff --git a/collects/framework/private/frame.ss b/collects/framework/private/frame.ss
index 8d578917..3b7bdec2 100644
--- a/collects/framework/private/frame.ss
+++ b/collects/framework/private/frame.ss
@@ -1,5 +1,6 @@
 (module frame mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")
diff --git a/collects/framework/private/group.ss b/collects/framework/private/group.ss
index 20f40d1d..2a793ad2 100644
--- a/collects/framework/private/group.ss
+++ b/collects/framework/private/group.ss
@@ -1,5 +1,6 @@
 (module group mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "list.ss")
diff --git a/collects/framework/private/handler.ss b/collects/framework/private/handler.ss
index f3dbf0f6..e56f6804 100644
--- a/collects/framework/private/handler.ss
+++ b/collects/framework/private/handler.ss
@@ -1,5 +1,6 @@
 (module handle mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")
diff --git a/collects/framework/private/icon.ss b/collects/framework/private/icon.ss
index 6eeabe77..038f1f8e 100644
--- a/collects/framework/private/icon.ss
+++ b/collects/framework/private/icon.ss
@@ -1,5 +1,6 @@
 (module icon mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "mred-sig.ss" "mred"))
diff --git a/collects/framework/private/keymap.ss b/collects/framework/private/keymap.ss
index 816ad45b..f45bde7c 100644
--- a/collects/framework/private/keymap.ss
+++ b/collects/framework/private/keymap.ss
@@ -1,5 +1,6 @@
 (module keymap mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   (lib "list.ss")
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/main.ss b/collects/framework/private/main.ss
index 3e75a36c..ef57d321 100644
--- a/collects/framework/private/main.ss
+++ b/collects/framework/private/main.ss
@@ -1,5 +1,6 @@
 (module main mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig.ss"
 	   (lib "mred-sig.ss" "mred"))
   
diff --git a/collects/framework/private/menu.ss b/collects/framework/private/menu.ss
index d5b64650..4f3fee84 100644
--- a/collects/framework/private/menu.ss
+++ b/collects/framework/private/menu.ss
@@ -1,5 +1,6 @@
 (module menu mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/panel.ss b/collects/framework/private/panel.ss
index e4eda36b..499467d9 100644
--- a/collects/framework/private/panel.ss
+++ b/collects/framework/private/panel.ss
@@ -1,5 +1,6 @@
 (module panel mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "list.ss"))
diff --git a/collects/framework/private/pasteboard.ss b/collects/framework/private/pasteboard.ss
index 2452ac86..c4fa3018 100644
--- a/collects/framework/private/pasteboard.ss
+++ b/collects/framework/private/pasteboard.ss
@@ -1,5 +1,6 @@
 (module pasteboard mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/path-util.ss b/collects/framework/private/path-util.ss
index d9307562..6ae95124 100644
--- a/collects/framework/private/path-util.ss
+++ b/collects/framework/private/path-util.ss
@@ -1,5 +1,6 @@
 (module path-utils mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred"))
 
diff --git a/collects/framework/private/preferences.ss b/collects/framework/private/preferences.ss
index 3aa6b421..a06dfd28 100644
--- a/collects/framework/private/preferences.ss
+++ b/collects/framework/private/preferences.ss
@@ -1,5 +1,6 @@
 (module preferences mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "pretty.ss"))
diff --git a/collects/framework/private/scheme.ss b/collects/framework/private/scheme.ss
index 2d1e46e2..52b92745 100644
--- a/collects/framework/private/scheme.ss
+++ b/collects/framework/private/scheme.ss
@@ -5,6 +5,7 @@
 
 (module scheme mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   (lib "mred-sig.ss" "mred")
 	   (lib "list.ss")
diff --git a/collects/framework/private/text.ss b/collects/framework/private/text.ss
index c93b68ae..8e79d7fe 100644
--- a/collects/framework/private/text.ss
+++ b/collects/framework/private/text.ss
@@ -1,5 +1,6 @@
 (module text mzscheme
   (require (lib "unitsig.ss")
+	   (lib "class.ss")
 	   "sig"
 	   "../gui-utils-sig.ss"
 	   (lib "mred-sig.ss" "mred")