diff --git a/collects/mzlib/sigutil.ss b/collects/mzlib/sigutil.ss
index 6a40db6..b2616fb 100644
--- a/collects/mzlib/sigutil.ss
+++ b/collects/mzlib/sigutil.ss
@@ -1,5 +1,5 @@
 
-(module sigutils mzscheme
+(module sigutil mzscheme
   ;; Used by signedunit.ss 
 
   (import "sigmatch.ss")
diff --git a/collects/mzlib/unitsig.ss b/collects/mzlib/unitsig.ss
index 06fe83a..754a8f9 100644
--- a/collects/mzlib/unitsig.ss
+++ b/collects/mzlib/unitsig.ss
@@ -4,7 +4,7 @@
   (import "unit.ss")
   (import "sigmatch.ss")
 
-  (import-for-syntax "sigutils.ss")
+  (import-for-syntax "sigutil.ss")
   (import-for-syntax "sigmatch.ss")
 
   (define-struct/export unit/sig (unit imports exports))