diff --git a/pkgs/htdp-pkgs/htdp-lib/htdp/matrix.rkt b/pkgs/htdp-pkgs/htdp-lib/htdp/matrix.rkt
index 85e925a63e..8d0825a5df 100644
--- a/pkgs/htdp-pkgs/htdp-lib/htdp/matrix.rkt
+++ b/pkgs/htdp-pkgs/htdp-lib/htdp/matrix.rkt
@@ -51,12 +51,10 @@ position structures returned by matrix-where?
 (require htdp/matrix-sig
          htdp/matrix-render-sig
          htdp/matrix-unit
-         mrlib/matrix-snip)
-
-(require mzlib/class
-         mzlib/string
-         mred
-         mrlib/matrix-snip)
+         mrlib/matrix-snip
+         ; mzlib/string
+         mzlib/class mrlib/matrix-snip
+         mred)
 
 ;; ---------------------------------------------------------------------------