diff --git a/NEWS b/NEWS
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,27 @@
-smaoin 0.1.0.0 -- 2015-05-08
+smaoin 0.1.1.0 -- 2015-05-05
+============================
+
+General, build and documentation changes:
+
+* (None)
+
+New APIs, features and enhancements:
+
+* (None)
+
+Bug fixes:
+
+* RealNum wasn't an instance of Eq. Now it is.
+
+Dependency changes:
+
+* (None)
+
+
+
+
+
+smaoin 0.1.0.0 -- 2015-05-05
 ============================
 
 General, build and documentation changes:
diff --git a/smaoin.cabal b/smaoin.cabal
--- a/smaoin.cabal
+++ b/smaoin.cabal
@@ -1,5 +1,5 @@
 name:                smaoin
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            Utilities for the Smaoin semantic information model.
 description:         This package provides basic types and functions for
                      working with the Smaoin model in Haskell. But these are
diff --git a/src/Data/Smaoin.hs b/src/Data/Smaoin.hs
--- a/src/Data/Smaoin.hs
+++ b/src/Data/Smaoin.hs
@@ -66,6 +66,9 @@
             then cleanZeros d (y + 1)
             else (x, y)
 
+instance Eq RealNum where
+    m == n   =   normalize m == normalize n
+
 instance Num RealNum where
     (RealNum s1 e1) + (RealNum s2 e2) = normalize $ RealNum (s1' + s2') e'
         where