diff --git a/Data/Histogram/Bin/BinF.hs b/Data/Histogram/Bin/BinF.hs
--- a/Data/Histogram/Bin/BinF.hs
+++ b/Data/Histogram/Bin/BinF.hs
@@ -62,7 +62,7 @@
 binFstep = BinF
 
 -- | 'scaleBinF a b' scales BinF using linear transform 'a+b*x'
-scaleBinF :: RealFrac f => f -> f -> BinF f -> BinF f
+scaleBinF :: (Show f, RealFrac f) => f -> f -> BinF f -> BinF f
 scaleBinF a b (BinF base step n)
     | b > 0     = BinF (a + b*base) (b*step) n
     | otherwise = error $ "scaleBinF: b must be positive (b = "++show b++")"
diff --git a/histogram-fill.cabal b/histogram-fill.cabal
--- a/histogram-fill.cabal
+++ b/histogram-fill.cabal
@@ -1,5 +1,5 @@
 Name:           histogram-fill
-Version:        0.6.0.0
+Version:        0.6.0.1
 Cabal-Version:  >= 1.6
 License:        BSD3
 License-File:   LICENSE
@@ -12,6 +12,10 @@
 Description:    
   This is library for histograms filling. Its aim to provide
   convenient way to create and fill histograms. 
+  .
+  Changes in 0.6.0.1
+  .
+  * Fixed compilation with GHC 7.4
 
 source-repository head
   type:     hg