diff --git a/osm_lcm/lcm_utils.py b/osm_lcm/lcm_utils.py
index bb53d7c..2779a25 100644
--- a/osm_lcm/lcm_utils.py
+++ b/osm_lcm/lcm_utils.py
@@ -42,7 +42,9 @@
     """
     filled = []
     for point in v.split("."):
-        filled.append(point.zfill(16))
+        point, _, _ = point.partition("+")
+        point, _, _ = point.partition("-")
+        filled.append(point.zfill(20))
     return tuple(filled)