1 files changed, 5 insertions, 1 deletions
diff --git a/x2p/a2p.c b/x2p/a2p.c
index 1098b1e686..9d1d1725cb 100644
--- a/x2p/a2p.c
+++ b/x2p/a2p.c
@@ -2179,13 +2179,17 @@ int yyparse (void);
 #define YYREJECT goto yyabort
 #define YYACCEPT goto yyaccept
 #define YYERROR goto yyerrlab
+
+#if YYDEBUG
+EXTERN_C char *getenv(const char *);
+#endif
+
 int
 yyparse(void)
 {
     register int yym, yyn, yystate;
 #if YYDEBUG
     register char *yys;
-    extern char *getenv();
 
     if ((yys = getenv("YYDEBUG")))
     {