diff --git a/examples/variant.yy b/examples/variant.yy
index ec06981f..39a57ba8 100644
--- a/examples/variant.yy
+++ b/examples/variant.yy
@@ -18,7 +18,7 @@
 %debug
 %skeleton "lalr1.cc"
 %defines
-%define assert
+%define parse.assert
 %define variant
 %define lex_symbol
 %locations