diff --git a/pyart/util/radar_utils.py b/pyart/util/radar_utils.py
index 64735a8a50..b4097b62fd 100644
--- a/pyart/util/radar_utils.py
+++ b/pyart/util/radar_utils.py
@@ -112,7 +112,7 @@ def determine_sweeps(radar, max_offset=0.1, running_win_dt=5.0, deg_rng=(-5.0, 3
 
     Parameters
     ----------
-    radar : radar object
+    radar : Radar object
         The radar object containing the data.
     max_offset : float
         Maximum elevation offset (if is_ppi is True) or azimuth offset (if