--- a/src/ui.h
+++ b/src/ui.h
@@ -38,6 +38,9 @@ extern int hnb_edit_posup;
 extern int hnb_edit_posdown;
 
 extern int ui_inited;
+extern int nodes_above;
+extern int active_line;
+extern int nodes_below;
 
 void ui_getstr (char *prompt, char *datastorage);
 
--- a/src/ui_draw.c
+++ b/src/ui_draw.c
@@ -39,9 +39,9 @@
 
 #define KEEPLINES 5
 
-int nodes_above;
-int active_line;
-int nodes_below;
+extern int nodes_above;
+extern int active_line;
+extern int nodes_below;
 
 static Node *up (Node *sel, Node *node)
 {