diff --git a/contrib/crypto/load.factor b/contrib/crypto/load.factor
index a09ef4ae86..5d8ef336ed 100644
--- a/contrib/crypto/load.factor
+++ b/contrib/crypto/load.factor
@@ -1,6 +1,7 @@
 IN: crypto
 USING: parser sequences words compiler ;
 [
+    "contrib/math/load.factor"
     "contrib/crypto/common.factor"
     "contrib/crypto/md5.factor"
     "contrib/crypto/sha1.factor"
diff --git a/contrib/crypto/sha1.factor b/contrib/crypto/sha1.factor
index 73d84617b4..b91cf8615c 100644
--- a/contrib/crypto/sha1.factor
+++ b/contrib/crypto/sha1.factor
@@ -1,6 +1,6 @@
 IN: crypto-internals
 USING: kernel io strings sequences namespaces math prettyprint
-test parser lists vectors hashtables kernel-internals crypto ;
+test parser lists vectors hashtables kernel-internals math-contrib crypto ;
 
 ! Implemented according to RFC 3174.