diff --git a/modules/dnn/src/dnn.cpp b/modules/dnn/src/dnn.cpp
index 7c4950eb9255..3c10db6b8aa8 100644
--- a/modules/dnn/src/dnn.cpp
+++ b/modules/dnn/src/dnn.cpp
@@ -4976,9 +4976,7 @@ void Net::setInput(InputArray blob, const String& name, double scalefactor, cons
     MatShape prevShape = shape(impl->netInputLayer->inputsData[pin.oid]);
     bool oldShape = prevShape == blobShape;
 
-    // blob_.copyTo(impl->netInputLayer->inputsData[pin.oid]);
-    impl->netInputLayer->inputsData.emplace(impl->netInputLayer->inputsData.begin()+pin.oid, blob_);
-    impl->netInputLayer->inputsData.erase(impl->netInputLayer->inputsData.begin()+pin.oid+1);
+    blob_.copyTo(impl->nPetInputLayer->inputsData[pin.oid]);
     if (!oldShape) {
         ld.outputBlobs[pin.oid] = impl->netInputLayer->inputsData[pin.oid];
         if (impl->hasDynamicShapes)