diff --git a/modules/dnn/perf/perf_layer.cpp b/modules/dnn/perf/perf_layer.cpp
index 38e35f1258..1e7552c86c 100644
--- a/modules/dnn/perf/perf_layer.cpp
+++ b/modules/dnn/perf/perf_layer.cpp
@@ -55,7 +55,7 @@ struct Layer_Slice : public TestBaseWithParam<tuple<Backend, Target> >
     }
 };
 
-static std::set<std::string> nary_eltwise_cuda_deny_ops = {"add", "equal", "greater", "less", "mean", "mul", "pow", "sub"};
+static std::set<std::string> nary_eltwise_cuda_deny_ops = {"equal", "greater", "less", "mean", "pow", "sub"};
 
 struct Layer_NaryEltwise : public TestBaseWithParam<tuple<Backend, Target> >
 {
diff --git a/modules/dnn/src/layers/nary_eltwise_layers.cpp b/modules/dnn/src/layers/nary_eltwise_layers.cpp
index 3f43c024c7..91eb7f3c0e 100644
--- a/modules/dnn/src/layers/nary_eltwise_layers.cpp
+++ b/modules/dnn/src/layers/nary_eltwise_layers.cpp
@@ -112,7 +112,7 @@ public:
                     op == OPERATION::LESS_EQUAL
             );
         if (op == OPERATION::MAX || op == OPERATION::MIN || op == OPERATION::SUM ||
-            op == OPERATION::PROD || op == OPERATION::DIV)
+            op == OPERATION::PROD || op == OPERATION::DIV || op == OPERATION::ADD)
             return backendId == DNN_BACKEND_OPENCV || backendId == DNN_BACKEND_CUDA;
         return backendId == DNN_BACKEND_OPENCV;
     }
@@ -688,6 +688,7 @@ public:
                 case OPERATION::SUM: return cuda4dnn::EltwiseOpType::SUM;
                 case OPERATION::PROD: return cuda4dnn::EltwiseOpType::PRODUCT;
                 case OPERATION::DIV: return cuda4dnn::EltwiseOpType::DIV;
+                case OPERATION::ADD: return cuda4dnn::EltwiseOpType::SUM;
                 default: CV_Error(Error::StsNotImplemented, "Other operators except MAX, MIN, SUM, PRODUCT and DIV are not supported with cuda.");
             }
         }();