--- libplot/imagen/imp.h.orig	2020-08-28 11:01:25 UTC
+++ libplot/imagen/imp.h
@@ -13,6 +13,6 @@ extern float botx;
 extern float oboty;
 extern float scalex;
 extern float scaley;
-int imPx, imPy;
+extern int imPx, imPy;
 extern int imPcsize;
 extern char *imP_charset;