diff --git a/src/compiler/GF/Compile/Compute/Predef.hs b/src/compiler/GF/Compile/Compute/Predef.hs
index 69df3792c..609a17798 100644
--- a/src/compiler/GF/Compile/Compute/Predef.hs
+++ b/src/compiler/GF/Compile/Compute/Predef.hs
@@ -27,7 +27,6 @@ instance Predef Int where
 
 instance Predef Bool where
   toValue = boolV
-  fromValue boolV = return (boolV == boolV) 
 
 instance Predef String where
   toValue = string