diff --git a/hydrogen-syntax.cabal b/hydrogen-syntax.cabal
--- a/hydrogen-syntax.cabal
+++ b/hydrogen-syntax.cabal
@@ -1,5 +1,5 @@
 name:                   hydrogen-syntax
-version:                0.12
+version:                0.12.0.1
 homepage:               https://scravy.de/hydrogen-syntax/
 synopsis:               Hydrogen Syntax
 license:                BSD3
diff --git a/src/Hydrogen/Syntax/Parser/LayoutParser.hs b/src/Hydrogen/Syntax/Parser/LayoutParser.hs
--- a/src/Hydrogen/Syntax/Parser/LayoutParser.hs
+++ b/src/Hydrogen/Syntax/Parser/LayoutParser.hs
@@ -13,7 +13,7 @@
 }
 
 instance Default (LayoutConfig a) where
-    default_ = LayoutConfig {
+    def = LayoutConfig {
         cfgValueTokens = const Nothing
       , cfgBlockTransformer = id
       , cfgIndentToken = ";;"
diff --git a/src/Hydrogen/Syntax/Parser/TokenParser.hs b/src/Hydrogen/Syntax/Parser/TokenParser.hs
--- a/src/Hydrogen/Syntax/Parser/TokenParser.hs
+++ b/src/Hydrogen/Syntax/Parser/TokenParser.hs
@@ -19,7 +19,7 @@
 } deriving (Eq, Show)
 
 instance Default TokenizerConfig where
-    default_ = TokenizerConfig {
+    def = TokenizerConfig {
         cfgSpaces = " "
       , cfgEscapes = [
             ('\\', '\\'),