diff --git a/minimap.py b/minimap.py
index 92a8e4a..571c4b4 100644
--- a/minimap.py
+++ b/minimap.py
@@ -85,7 +85,7 @@ def haver_dist(coord1, coord2):
     dlati = lati2 - lati1
     a = (
         math.sin(dlati / 2) ** 2
-        + math.cos(lati1) * math.cos(lati2) * math.sin(dlon / 2) ** 2
+        + math.cos(lati1) * math.cos(lati2) * math.sin(dlong / 2) ** 2
     )
     c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
     distance = R * c