diff --git a/nncf/common/quantization/structs.py b/nncf/common/quantization/structs.py
index 49dcc694e7b..b7f198496c1 100644
--- a/nncf/common/quantization/structs.py
+++ b/nncf/common/quantization/structs.py
@@ -24,7 +24,7 @@
 
 
 @api()
-class QuantizationScheme(StrEnum):
+class QuantizationScheme:
     """
     Basic enumeration for quantization scheme specification.