diff --git a/docs/history.md b/docs/history.md
index ad84b90..aa9d3af 100644
--- a/docs/history.md
+++ b/docs/history.md
@@ -1,5 +1,9 @@
 # History
 
+## 0.4.3 (2024-02-24)
+
+* FIX: use len(unique) to estimate unique entry for odim range ({pull}`151`) by [@martinpaule](https://github.com/martinpaule).
+
 ## 0.4.2 (2023-11-02)
 
 * FIX: Fix handling of sweep_mode attributes ({pull}`143`) by [@mgrover1](https://github.com/mgrover1)
diff --git a/xradar/model.py b/xradar/model.py
index 5a91a30..ed37b64 100644
--- a/xradar/model.py
+++ b/xradar/model.py
@@ -627,7 +627,7 @@ def get_range_attrs(rng=None):
     if rng is not None:
         diff = np.diff(rng)
         unique = np.unique(diff)
-        if unique:
+        if len(unique) == 1:
             spacing = "true"
             range_attrs["meters_between_gates"] = diff[0]
         else: