diff --git a/README.md b/README.md
index d5fea31..0abc6e1 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ The bot will consider an aircraft to be "circling" if:
 1. In the past 25 minutes, the sum of the aircraft's bearing changes
    is more than 1440 degrees. Port turns cancel out starboard turns
    and vice versa--there needs to be a net change of at least 1440
-   degrees.
+   degrees in one direction.
 
 2. The centroid of the last 3 minutes worth of positions must be more
    than 2.5 miles away from all known airports.