diff --git a/examples/group-transparency.hs b/examples/group-transparency.hs
index 1c68647..a8abc4e 100644
--- a/examples/group-transparency.hs
+++ b/examples/group-transparency.hs
@@ -6,7 +6,7 @@ import Diagrams.Backend.PGF.CmdLine
 
 -- Example of group opacity.
 
-type D2 = Diagram PGF V2 Double
+type D2 = Diagram PGF
 
 main = defaultMain (frame 10 xs)
 
diff --git a/examples/hbox.hs b/examples/hbox.hs
index ecd2bad..b639eac 100644
--- a/examples/hbox.hs
+++ b/examples/hbox.hs
@@ -4,7 +4,7 @@ import Diagrams.TwoD.Vector         (perp)
 
 import Diagrams.Size
 
-type D2 = Diagram PGF V2 Double
+type D2 = Diagram PGF
 
 -- The simplest way to construct a hbox with an envelope is to use
 --
diff --git a/examples/sums.hs b/examples/sums.hs
index a5e5fda..2359ef4 100644
--- a/examples/sums.hs
+++ b/examples/sums.hs
@@ -3,7 +3,7 @@ import Control.Lens ((<&>))
 import Diagrams.Prelude
 import Diagrams.Backend.PGF.CmdLine
 
-type D2 = Diagram PGF V2 Float
+type D2 = Diagram PGF
 
 maxSum = 6 :: Int
 
@@ -13,7 +13,7 @@ sumTo n = show $ (n * (n + 1)) `div` 2
 mkSum :: Int -> OnlineTeX D2
 mkSum n = onlineHbox (displayStyle tex)
            <&> centerXY
-           <&> named n 
+           <&> named n
  where
    tex | n == maxSum = sumTo maxSum
        | otherwise   = sumTo n ++ " + \\sum_{i=" ++ show (n+1) ++ "}^{" ++ show maxSum ++ "} i"
diff --git a/examples/triangle.hs b/examples/triangle.hs
index 28c7390..505655e 100755
--- a/examples/triangle.hs
+++ b/examples/triangle.hs
@@ -2,10 +2,10 @@ import Diagrams.Prelude
 import Diagrams.Backend.PGF.CmdLine
 import Diagrams.TwoD.Vector         (perp)
 
--- Example using TeX primatives to make a text box with given width. Also 
+-- Example using TeX primatives to make a text box with given width. Also
 -- includes roundedRect background and labeling.
 
-type D2 = Diagram PGF V2 Double
+type D2 = Diagram PGF
 
 main = onlineMain example