diff --git a/Sound/SC3/Common/Math/Operator.hs b/Sound/SC3/Common/Math/Operator.hs
--- a/Sound/SC3/Common/Math/Operator.hs
+++ b/Sound/SC3/Common/Math/Operator.hs
@@ -195,13 +195,13 @@
     ,(FDiv,"/")
     ,(Mod,"%")
     ,(EQ_,"==")
-    ,(NE,"/=") -- !=
+    ,(NE,"/=") -- or !=
     ,(LT_,"<")
     ,(GT_,">")
     ,(LE,"<=")
     ,(GE,">=")
-    ,(BitAnd,".&.") -- &
-    ,(BitOr,".|.") -- |
+    ,(BitAnd,".&.") -- or &
+    ,(BitOr,".|.") -- or |
     ,(Pow,"**")]
 
 -- | Table of operator names (non-symbolic) and indices.
diff --git a/hsc3.cabal b/hsc3.cabal
--- a/hsc3.cabal
+++ b/hsc3.cabal
@@ -1,5 +1,5 @@
 Name:              hsc3
-Version:           0.19
+Version:           0.19.1
 Synopsis:          Haskell SuperCollider
 Description:       Haskell client for the SuperCollider synthesis server,
                    <http://audiosynth.com/>.