diff --git a/include/base.h b/include/base.h
index 402ab4d..105b981 100644
--- a/include/base.h
+++ b/include/base.h
@@ -40,6 +40,7 @@ struct {
     int x;
     int y;
     int z;
+    int o;
 } typedef Arrow_t;
 
 struct {
@@ -50,7 +51,7 @@ struct {
 
 struct {
     char *label;
-    int narrow;
+    int arrowId;
 } typedef Site_t;
 
 struct {