diff --git a/examples/blosc2_optimized_slicing.py b/examples/blosc2_optimized_slicing.py
index e04026d..db803fb 100644
--- a/examples/blosc2_optimized_slicing.py
+++ b/examples/blosc2_optimized_slicing.py
@@ -94,3 +94,4 @@
     slice_ = dataset[150:, 150:]
     print("Slice from dataset:", slice_, sep='\n')
     print("Slice from input array:", data[150:, 150:], sep='\n')
+os.environ['BLOSC2_FILTER'] = '0'  # back to normal