diff --git a/model_tools/include/OPOptimizers/QuantizationOptimizer.hpp b/model_tools/include/OPOptimizers/QuantizationOptimizer.hpp
index c032a210..8fbf728d 100644
--- a/model_tools/include/OPOptimizers/QuantizationOptimizer.hpp
+++ b/model_tools/include/OPOptimizers/QuantizationOptimizer.hpp
@@ -219,7 +219,7 @@ class QuantizationOptimizer : public OPOptimizer {
 
     bool isNotNaiveRelu(OperatorSpec *op)
     {
-        return ((op->type == OT_Relu) && (op->ps.relu_spec.neg_slope != 0));
+        return ((op->type == OT_Relu && op->ps.relu_spec.neg_slope != 0) || op->type == OT_Relu6);
     }
 
     bool isAvgPooling(OperatorSpec *op)