diff --git a/track.c b/track.c
index a14474c..83d37df 100644
--- a/track.c
+++ b/track.c
@@ -765,7 +765,7 @@ static unsigned compute_rc(unsigned metype, unsigned version, unsigned nic_a, un
                 return 14816; // 8NM
             }
         } else {
-            return 18510; // 10NM
+            return 18520; // 10NM
         }
 
     case 17: // airborne