diff --git a/acconfig.h b/acconfig.h
index 8d0560b6a..b7f357405 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -64,12 +64,15 @@
 /*  Define this if struct winsize is declared in sys/termios.h */
 #undef HAVE_STRUCT_WINSIZE
 
-/*  Define this if struct winsize have ws_xpixel */
+/*  Define this if struct winsize has ws_xpixel */
 #undef HAVE_WS_XPIXEL
 
-/*  Define this if struct winsize have ws_ypixel */
+/*  Define this if struct winsize has ws_ypixel */
 #undef HAVE_WS_YPIXEL
 
+/*  Define this if struct sockaddr has sa_len */
+#undef SOCKADDR_HAS_SA_LEN
+
 #undef VOID_RETSIGTYPE
 
 #ifdef VOID_RETSIGTYPE