diff --git a/dhscanner-kbgen.cabal b/dhscanner-kbgen.cabal
--- a/dhscanner-kbgen.cabal
+++ b/dhscanner-kbgen.cabal
@@ -33,7 +33,7 @@
         * explain in plain English your query's purpose
         * et voilà !
 
-version:            1.0.32
+version:            1.0.33
 license:            GPL-3.0-only
 license-file:       LICENSE
 author:             OrenGitHub
diff --git a/src/Kbgen.hs b/src/Kbgen.hs
--- a/src/Kbgen.hs
+++ b/src/Kbgen.hs
@@ -1026,6 +1026,8 @@
 normalizeChar '-' = "_dash_"
 normalizeChar '['  = "_lbrack_"
 normalizeChar ']'  = "_rbrack_"
+normalizeChar '('  = "_lparen_"
+normalizeChar ')'  = "_rparen_"
 normalizeChar c = [c]
 
 normalize :: FilePath -> FilePath