4 files changed, 4 insertions, 3 deletions
diff --git a/libraries/base/System/Event/Clock.hsc b/libraries/base/System/Event/Clock.hsc
index fec00bbf3a..73d2a52798 100644
--- a/libraries/base/System/Event/Clock.hsc
+++ b/libraries/base/System/Event/Clock.hsc
@@ -1,3 +1,4 @@
+{-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE ForeignFunctionInterface #-}
 
 module System.Event.Clock (getCurrentTime) where
diff --git a/libraries/base/System/Event/Control.hs b/libraries/base/System/Event/Control.hs
index 159cbce26f..167eb774c7 100644
--- a/libraries/base/System/Event/Control.hs
+++ b/libraries/base/System/Event/Control.hs
@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP, ForeignFunctionInterface, NoImplicitPrelude,
-    ScopedTypeVariables #-}
+    ScopedTypeVariables, BangPatterns #-}
 
 module System.Event.Control
     (
diff --git a/libraries/base/System/Event/EPoll.hsc b/libraries/base/System/Event/EPoll.hsc
index 098946e46b..ccc8ec032c 100644
--- a/libraries/base/System/Event/EPoll.hsc
+++ b/libraries/base/System/Event/EPoll.hsc
@@ -1,5 +1,5 @@
 {-# LANGUAGE ForeignFunctionInterface, GeneralizedNewtypeDeriving,
-    NoImplicitPrelude #-}
+    NoImplicitPrelude, BangPatterns #-}
 
 --
 -- | A binding to the epoll I/O event notification facility
diff --git a/libraries/base/System/Event/Poll.hsc b/libraries/base/System/Event/Poll.hsc
index dc577a85f1..d6929f801c 100644
--- a/libraries/base/System/Event/Poll.hsc
+++ b/libraries/base/System/Event/Poll.hsc
@@ -1,5 +1,5 @@
 {-# LANGUAGE ForeignFunctionInterface, GeneralizedNewtypeDeriving,
-    NoImplicitPrelude #-}
+    NoImplicitPrelude, BangPatterns #-}
 
 module System.Event.Poll
     (