diff --git a/parser/libapparmor_re/parse.y b/parser/libapparmor_re/parse.y
index ea4ec5c34..47f3ccc46 100644
--- a/parser/libapparmor_re/parse.y
+++ b/parser/libapparmor_re/parse.y
@@ -62,7 +62,7 @@ static inline Chars* insert_char_range(Chars* cset, transchar a, transchar b)
 %lex-param {YYLEX_PARAM}
 %parse-param {Node **root}
 %parse-param {const char *text}
-%name-prefix "regex_"
+%define api.prefix {regex_}
 
 %token <c> CHAR
 %type <c> regex_char cset_char1 cset_char cset_charN