Index: darcs/hashed-storage/Storage/Hashed/Utils.hs
===================================================================
--- darcs.orig/hashed-storage/Storage/Hashed/Utils.hs	2015-07-09 18:48:56.000000000 +0200
+++ darcs/hashed-storage/Storage/Hashed/Utils.hs	2015-07-15 19:35:55.341427506 +0200
@@ -100,7 +100,7 @@
 #endif
 
 #ifdef BIGENDIAN
-bytemask :: (Bits a) => a
+bytemask :: (Num a, Bits a) => a
 bytemask = 255
 
 xlate32 a = ((a .&. (bytemask `shift`  0)) `shiftL` 24) .|.
