diff --git a/examples/l5pc_lfpy/generate_extra_features.py b/examples/l5pc_lfpy/generate_extra_features.py
index 98b8ce23..1679eda6 100644
--- a/examples/l5pc_lfpy/generate_extra_features.py
+++ b/examples/l5pc_lfpy/generate_extra_features.py
@@ -71,7 +71,7 @@ def default(self, obj):
         ):
             return int(obj)
         elif isinstance(
-            obj, (numpy.float_, numpy.float16, numpy.float32, numpy.float64)
+            obj, (numpy.float16, numpy.float32, numpy.float64)
         ):
             return float(obj)
         elif isinstance(obj, numpy.ndarray):