diff --git a/src/finn/core/execute_custom_node.py b/src/finn/core/execute_custom_node.py
index 744ecf1b72abfd4bf2e60c5e8d258e16f72363fd..c941b5011bbae20cef7f751351dd581086d05f9d 100644
--- a/src/finn/core/execute_custom_node.py
+++ b/src/finn/core/execute_custom_node.py
@@ -1,6 +1,6 @@
 # import onnx.helper as helper
 
-import finn.core.MultiThreshold as multiThresh
+import finn.core.multithreshold as multiThresh
 
 
 def execute_custom_node(node, context, graph):
@@ -12,7 +12,7 @@ def execute_custom_node(node, context, graph):
         # save inputs
         v = context[node.input[0]]
         thresholds = context[node.input[1]]
-        
+
         # calculate output
         output = multiThresh.execute(v, thresholds)
 
diff --git a/src/finn/core/MultiThreshold.py b/src/finn/core/multithreshold.py
similarity index 100%
rename from src/finn/core/MultiThreshold.py
rename to src/finn/core/multithreshold.py
diff --git a/tests/test_multi_thresholding.py b/tests/test_multi_thresholding.py
index b5b952d1b726376089353f4f5901630dd0181bff..49305e5572f35eb4a2e5f7678c73038777eb8b92 100644
--- a/tests/test_multi_thresholding.py
+++ b/tests/test_multi_thresholding.py
@@ -1,6 +1,6 @@
 import numpy as np
 
-import finn.core.MultiThreshold as multi_thresh
+import finn.core.multithreshold as multi_thresh
 
 
 def test_execute_multi_thresholding():