diff --git a/Yampa.cabal b/Yampa.cabal
--- a/Yampa.cabal
+++ b/Yampa.cabal
@@ -1,5 +1,5 @@
 name: Yampa
-version: 0.9.2.1
+version: 0.9.2.2
 cabal-Version: >= 1.2
 license: BSD3
 license-file: LICENSE
diff --git a/src/FRP/Yampa.hs b/src/FRP/Yampa.hs
--- a/src/FRP/Yampa.hs
+++ b/src/FRP/Yampa.hs
@@ -2964,6 +2964,7 @@
 ------------------------------------------------------------------------------
 
 -- Integration using the rectangle rule.
+{-# INLINE integral #-}
 integral :: VectorSpace a s => SF a a
 integral = SF {sfTF = tf0}
     where