diff --git a/prologue.cabal b/prologue.cabal
--- a/prologue.cabal
+++ b/prologue.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 93924f91fadef97edd78ddbaa2fbdda64321ea48a9f73656b565df564606c97c
+-- hash: 3fe730e269997bb415be310c9f50e763eb75d92f00169835ab0d84a1b22fca2e
 
 name:           prologue
-version:        3.1.6
+version:        3.1.7
 synopsis:       Better, more general Prelude exporting common utilities.
 description:    Replacement for the Haskell's Prelude, exposing more commonly used functions and patching old GHC ones to behave in the newest GHC's way.
 category:       control
diff --git a/src/Prologue/Control/Error.hs b/src/Prologue/Control/Error.hs
--- a/src/Prologue/Control/Error.hs
+++ b/src/Prologue/Control/Error.hs
@@ -25,7 +25,7 @@
 unsafeFoldr1  :: (a -> a -> a) -> [a] -> a
 unsafeFoldl1  :: (a -> a -> a) -> [a] -> a
 unsafeFoldl1' :: (a -> a -> a) -> [a] -> a
-unsafeRead    :: Read a => String -> a
+unsafeRead    :: forall a. Read a => String -> a
 unsafeTail    = P.tail    ; {-# INLINE unsafeTail    #-}
 unsafeInit    = P.init    ; {-# INLINE unsafeInit    #-}
 unsafeHead    = P.head    ; {-# INLINE unsafeHead    #-}