https://bugs.gentoo.org/886127

--- a/src/lib/libipv1/parse.y
+++ b/src/lib/libipv1/parse.y
@@ -1,6 +1,7 @@
 %{
 #include <stdio.h>
 #include <tmpl.h>
+#include "ip_error.gbl"
 #include "ip_types.h"
 #include "ip_read.gbl"
 %}
--- a/src/lib/libipv1/scan.l
+++ b/src/lib/libipv1/scan.l
@@ -1,6 +1,7 @@
 %{
 #include <string.h>
 #include <tmpl.h>
+#include "ip_error.gbl"
 #include "ip_types.h"
 #include "ip_global.h"
 #include "scan.gbl"