1 files changed, 2 insertions, 0 deletions
diff --git a/x2p/a2p.c b/x2p/a2p.c
index 340e4bfad6..e79e156203 100644
--- a/x2p/a2p.c
+++ b/x2p/a2p.c
@@ -2014,7 +2014,9 @@ yyparse()
     register int yym, yyn, yystate;
 #if YYDEBUG
     register char *yys;
+#ifndef __cplusplus
     extern char *getenv();
+#endif
 
     if (yys = getenv("YYDEBUG"))
     {