diff --git a/ehyd_tools/synthetic_rainseries.py b/ehyd_tools/synthetic_rainseries.py
index d117f63..85ba488 100644
--- a/ehyd_tools/synthetic_rainseries.py
+++ b/ehyd_tools/synthetic_rainseries.py
@@ -104,7 +104,7 @@ def get_series(self, return_period, duration, interval=5, kind=2):
         r = pd.Series(data=[0] + r.tolist(), index=[0]+r.index.values.tolist())
 
         # ---------------
-        if 0:
+        if _ := 0:
             _res = pd.DataFrame(index=filtered_series.index)
             _res['basis'] = return_period_series
             _res['gefüllt'] = filtered_series
diff --git a/ehyd_tools/synthetic_rainseries_v0.py b/ehyd_tools/synthetic_rainseries_v0.py
index d265cbf..5612c5b 100644
--- a/ehyd_tools/synthetic_rainseries_v0.py
+++ b/ehyd_tools/synthetic_rainseries_v0.py
@@ -51,7 +51,7 @@ def euler_model_rain(idf_table, return_period, duration, interval=5, occurrence_
     r = pd.concat([r, pd.Series({0: 0})]).sort_index()
 
     # ---------------
-    if 0:
+    if _ := 0:
         _res = pd.DataFrame(index=filtered_series.index)
         _res['basis'] = return_period_series
         _res['gefüllt'] = filtered_series