diff --git a/src/finn/builder/build_dataflow_config.py b/src/finn/builder/build_dataflow_config.py
index 9bda8cb50e5c62686072942d1dccf59005a6815a..698f050cc25937684f935d78fb8eb05da4662049 100644
--- a/src/finn/builder/build_dataflow_config.py
+++ b/src/finn/builder/build_dataflow_config.py
@@ -389,6 +389,6 @@ class DataflowBuildConfig:
             )
             verify_expected_output_npy = np.load(self.verify_expected_output_npy)
             return (
-                verify_input_npy.astype(np.float32),
-                verify_expected_output_npy.astype(np.float32),
+                verify_input_npy,
+                verify_expected_output_npy,
             )