diff --git a/collects/mred/edit.ss b/collects/mred/edit.ss
index 575fff41..846c872a 100644
--- a/collects/mred/edit.ss
+++ b/collects/mred/edit.ss
@@ -1,6 +1,7 @@
 
   (unit/sig mred:edit^
-    (import [mred:connections : mred:connections^]
+    (import [mred:constants : mred:constants^]
+	    [mred:connections : mred:connections^]
 	    [mred:finder : mred:finder^]
 	    [mred:path-utils : mred:path-utils^]
 	    [mred:mode : mred:mode^]
diff --git a/collects/mred/exit.ss b/collects/mred/exit.ss
index a3c0e0d3..c6e806fc 100644
--- a/collects/mred/exit.ss
+++ b/collects/mred/exit.ss
@@ -1,6 +1,7 @@
 
   (unit/sig mred:exit^
-    (import [mred:preferences : mred:preferences^]
+    (import [mred:constants : mred:constants^]
+	    [mred:preferences : mred:preferences^]
 	    [mred:gui-utils : mred:gui-utils^])
     (rename (-exit exit))
 
diff --git a/collects/mred/finder.ss b/collects/mred/finder.ss
index d34f2ae9..28d70c89 100644
--- a/collects/mred/finder.ss
+++ b/collects/mred/finder.ss
@@ -1,6 +1,7 @@
 
   (unit/sig mred:finder^
-    (import [mred:container : mred:container^]
+    (import [mred:constants : mred:constants^]
+	    [mred:container : mred:container^]
 	    [mred:preferences : mred:preferences^]
 	    [mred:gui-utils : mred:gui-utils^]
 	    [mred:edit : mred:edit^]
diff --git a/collects/mred/keys.ss b/collects/mred/keys.ss
index abd3acc9..0d486e37 100644
--- a/collects/mred/keys.ss
+++ b/collects/mred/keys.ss
@@ -1,6 +1,7 @@
 
   (unit/sig mred:keymap^
-    (import [mred:preferences : mred:preferences^]
+    (import [mred:constants : mred:constants^]
+	    [mred:preferences : mred:preferences^]
 	    [mred:exit : mred:exit^]
 	    [mred:finder : mred:finder^]
 	    [mred:handler : mred:handler^]
diff --git a/collects/mred/panel.ss b/collects/mred/panel.ss
index 1eafb5a7..1001f5f3 100644
--- a/collects/mred/panel.ss
+++ b/collects/mred/panel.ss
@@ -1,6 +1,7 @@
 
   (unit/sig mred:panel^
-    (import [mred:container : mred:container^]
+    (import [mred:constants : mred:constants^]
+	    [mred:container : mred:container^]
 	    [mred:canvas : mred:canvas^]
 	    mzlib:function^)
 
diff --git a/collects/mred/prefs.ss b/collects/mred/prefs.ss
index a4099b79..f64ea19c 100644
--- a/collects/mred/prefs.ss
+++ b/collects/mred/prefs.ss
@@ -1,7 +1,8 @@
 ;; need a preference for pconvert
 
   (unit/sig mred:preferences^
-    (import [mred:exn : mred:exn^]
+    (import [mred:constants : mred:constants^]
+	    [mred:exn : mred:exn^]
 	    [mred : mred:container^] ;; warning -- to use the mred:panel macros, 
 	                             ;; need to have mred:container be prefixed with "mred"
 	    [mred:exit : mred:exit^]