diff --git a/src/DynareBison.yy b/src/DynareBison.yy
index 09f5d744ddae5cf061107f177eeb2b7c87eeb66a..165d0d3a90902befc7b77ff13042da7270835865 100644
--- a/src/DynareBison.yy
+++ b/src/DynareBison.yy
@@ -42,8 +42,7 @@ using pair_2strings = pair<string,string>;
 using tuple_4strings = tuple<string,string,string,string>;
 }
 
-%parse-param { ParsingDriver &driver }
-%lex-param { ParsingDriver &driver }
+%param { ParsingDriver &driver }
 
 %locations
 %initial-action
diff --git a/src/macro/MacroBison.yy b/src/macro/MacroBison.yy
index fbf415b3d60d63591884e483f1755f3015fa2f85..dbfebb13b13fa168525d09903c4c5a767da2a4b1 100644
--- a/src/macro/MacroBison.yy
+++ b/src/macro/MacroBison.yy
@@ -31,9 +31,8 @@
 class MacroDriver;
 }
 
-%parse-param { MacroDriver &driver }
+%param { MacroDriver &driver }
 %parse-param { ostream &out }
-%lex-param { MacroDriver &driver }
 
 %locations
 %initial-action