diff --git a/net/mDNSResponder/files/patch-dnsextd__lexer.l b/net/mDNSResponder/files/patch-dnsextd__lexer.l
new file mode 100644
index 000000000000..69ac4be20522
--- /dev/null
+++ b/net/mDNSResponder/files/patch-dnsextd__lexer.l
@@ -0,0 +1,16 @@
+--- mDNSShared/dnsextd_lexer.l.orig	2016-07-01 01:07:18 UTC
++++ mDNSShared/dnsextd_lexer.l
+@@ -23,6 +23,13 @@
+ 
+ extern YYSTYPE yylval;
+ 
++#if !defined YYSTYPE_yylineno
++#if YY_FLEX_MAJOR_VERSION <= 2 && YY_FLEX_MINOR_VERSION <= 5 && YY_FLEX_SUBMINOR_VERSION <= 4
++int yylineno = 1;
++#endif
++#endif
++
++
+ #define YY_NO_INPUT 1
+ int  yylex(void);
+