diff --git a/yolov8/src/block.cpp b/yolov8/src/block.cpp
index 43a694d6..6c6fb020 100644
--- a/yolov8/src/block.cpp
+++ b/yolov8/src/block.cpp
@@ -80,17 +80,31 @@ nvinfer1::IElementWiseLayer* convBnSiLU(nvinfer1::INetworkDefinition* network,
                                         std::map<std::string, nvinfer1::Weights> weightMap, nvinfer1::ITensor& input,
                                         int ch, int k, int s, int p, std::string lname) {
     nvinfer1::Weights bias_empty{nvinfer1::DataType::kFLOAT, nullptr, 0};
-    nvinfer1::IConvolutionLayer* conv =
-            network->addConvolutionNd(input, ch, nvinfer1::DimsHW{k, k}, weightMap[lname + ".conv.weight"], bias_empty);
+    nvinfer1::IConvolutionLayer* conv{nullptr};
+    std::string bias_name{lname + ".conv.bias"};
+    // Compatibility whether there is a bias or not
+    // fuse conv+nb into conv, the new conv layer will have bias, and bn will disappear
+    if(weightMap.find(bias_name) == weightMap.end()){
+        conv = network->addConvolutionNd(input, ch, nvinfer1::DimsHW{k, k}, weightMap[lname + ".conv.weight"], bias_empty);
+    }else{
+        conv = network->addConvolutionNd(input, ch, nvinfer1::DimsHW{k, k}, weightMap[lname + ".conv.weight"], weightMap[bias_name]);
+    }
     assert(conv);
     conv->setStrideNd(nvinfer1::DimsHW{s, s});
     conv->setPaddingNd(nvinfer1::DimsHW{p, p});
 
-    nvinfer1::IScaleLayer* bn = addBatchNorm2d(network, weightMap, *conv->getOutput(0), lname + ".bn", 1e-3);
+    // Compatibility whether there is a bn or not
+    nvinfer1::ILayer *layer{nullptr};
+    if(weightMap.find(std::string{lname + ".bn.weight"}) != weightMap.end()){
+        layer = addBatchNorm2d(network, weightMap, *conv->getOutput(0), lname + ".bn", 1e-3);
+    }else{
+        layer = conv;
+    }
+    nvinfer1::IActivationLayer* sigmoid = network->addActivation(*layer->getOutput(0), nvinfer1::ActivationType::kSIGMOID);
 
-    nvinfer1::IActivationLayer* sigmoid = network->addActivation(*bn->getOutput(0), nvinfer1::ActivationType::kSIGMOID);
     nvinfer1::IElementWiseLayer* ew =
-            network->addElementWise(*bn->getOutput(0), *sigmoid->getOutput(0), nvinfer1::ElementWiseOperation::kPROD);
+            network->addElementWise(*layer->getOutput(0), *sigmoid->getOutput(0), nvinfer1::ElementWiseOperation::kPROD);
+
     assert(ew);
     return ew;
 }