diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.9.3
+-------
+* Fixed subtraction again. For real this time.
+
 0.9.2.1
 -------
 * Support `generic-deriving` 1.7
diff --git a/log-domain.cabal b/log-domain.cabal
--- a/log-domain.cabal
+++ b/log-domain.cabal
@@ -1,6 +1,6 @@
 name:          log-domain
 category:      Numeric
-version:       0.9.2.1
+version:       0.9.3
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
diff --git a/src/Numeric/Log.hs b/src/Numeric/Log.hs
--- a/src/Numeric/Log.hs
+++ b/src/Numeric/Log.hs
@@ -215,7 +215,7 @@
   {-# INLINE (+) #-}
   Exp a - Exp b
     | a == negInf && b == negInf = Exp negInf
-    | otherwise = Exp (a + log1mexp (a - b))
+    | otherwise = Exp (a + log1mexp (b - a))
   {-# INLINE (-) #-}
   signum (Exp a)
     | a == negInf = 0