diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y
index 08377ad9a..46b3a9025 100644
--- a/frontends/verilog/verilog_parser.y
+++ b/frontends/verilog/verilog_parser.y
@@ -96,7 +96,7 @@ static void free_attr(std::map<std::string, AstNode*> *al)
 
 %}
 
-%name-prefix "frontend_verilog_yy"
+%define api.prefix {frontend_verilog_yy}
 
 %union {
 	std::string *string;