diff --git a/src/GF/Speech/PrSLF.hs b/src/GF/Speech/PrSLF.hs
index eb9055d0b..76231386d 100644
--- a/src/GF/Speech/PrSLF.hs
+++ b/src/GF/Speech/PrSLF.hs
@@ -32,7 +32,7 @@ import GF.Speech.FiniteState
 import GF.Speech.SRG
 import GF.Speech.TransformCFG
 
-import Data.Char (toUpper,toLower)
+import Data.Char (toUpper)
 import Data.List
 import Data.Maybe (fromMaybe)