diff --git a/libraries/base/GHC/IO/Exception.hs b/libraries/base/GHC/IO/Exception.hs
index 0ed504ccf6dd89a705c800d8310acaaaadbc6bb7..387644fff25afc9e03823c698a47139a531ac6af 100644
--- a/libraries/base/GHC/IO/Exception.hs
+++ b/libraries/base/GHC/IO/Exception.hs
@@ -323,7 +323,7 @@ instance Show IOErrorType where
       ResourceVanished  -> "resource vanished"
       SystemError       -> "system error"
       TimeExpired       -> "timeout"
-      UnsatisfiedConstraints -> "unsatisified constraints" -- ultra-precise!
+      UnsatisfiedConstraints -> "unsatisfied constraints" -- ultra-precise!
       UnsupportedOperation -> "unsupported operation"
 
 -- | Construct an 'IOError' value with a string describing the error.