diff --git a/src/qonnx/custom_op/registry.py b/src/qonnx/custom_op/registry.py
index 65b8b2ba..cefc0973 100644
--- a/src/qonnx/custom_op/registry.py
+++ b/src/qonnx/custom_op/registry.py
@@ -28,8 +28,6 @@
 
 import importlib
 
-from qonnx.util.basic import get_preferred_onnx_opset
-
 _QONNX_DOMAINS = ["finn", "qonnx.custom_op", "onnx.brevitas"]
 
 
@@ -45,6 +43,11 @@ def is_finn_op(op_type):
     return is_finn
 
 
+def get_preferred_onnx_opset():
+    "Return preferred ONNX opset version for QONNX"
+    return 11
+
+
 def getCustomOp(node, onnx_opset_version=get_preferred_onnx_opset(), brevitas_exception=True):
     "Return a QONNX CustomOp instance for the given ONNX node, if it exists."
     op_type = node.op_type
diff --git a/src/qonnx/util/basic.py b/src/qonnx/util/basic.py
index 7c1560ed..d91844da 100644
--- a/src/qonnx/util/basic.py
+++ b/src/qonnx/util/basic.py
@@ -51,7 +51,7 @@
 
 def get_preferred_onnx_opset():
     "Return preferred ONNX opset version for QONNX"
-    return 11
+    return qonnx.custom_op.registry.get_preferred_onnx_opset()
 
 
 def qonnx_make_model(graph_proto, **kwargs):