diff --git a/CMakeLists.txt b/CMakeLists.txt
index d046e61..814494a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,7 +37,7 @@ file(GLOB tkdnn_SRC "src/*.cpp")
 set(tkdnn_LIBS kernels ${CUDA_LIBRARIES} ${CUDA_CUBLAS_LIBRARIES} -lcudnn -lnvinfer ${OpenCV_LIBS})
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11")
-if(!OPENCV) 
+if(NOT OPENCV) 
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_USE_CXX11_ABI=0") 
 endif()
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include ${CUDA_INCLUDE_DIRS} ${OPENCV_INCLUDE_DIRS})
@@ -74,4 +74,4 @@ endif()
 message("install dir:" ${CMAKE_INSTALL_PREFIX})
 install(DIRECTORY include/ DESTINATION include/${CMAKE_PROJECT_NAME}
 FILES_MATCHING PATTERN "*.h")
-install(TARGETS tkDNN DESTINATION lib)
+install(TARGETS tkDNN kernels DESTINATION lib)
diff --git a/include/Layer.h b/include/Layer.h
index 3cc2756..e3f8fc2 100644
--- a/include/Layer.h
+++ b/include/Layer.h
@@ -274,6 +274,7 @@ public:
 
 
 struct box {
+    int cl;
     float x, y, w, h;
 };
 struct sortable_bbox {
diff --git a/src/Region.cpp b/src/Region.cpp
index bb9a81d..71495b6 100644
--- a/src/Region.cpp
+++ b/src/Region.cpp
@@ -256,6 +256,7 @@ void RegionInterpret::interpretData(dnnType *data_h) {
     }
     //
 
+    res_boxes_n = 0;
     //print results
     for(int i = 0; i < tot; ++i){
         int cl = max_index(probs[i], classes);
@@ -273,6 +274,7 @@ void RegionInterpret::interpretData(dnnType *data_h) {
             b.y = y;
             b.h = h;
             b.w = w;
+            b.cl = cl;
             res_boxes[res_boxes_n] = b;
             res_boxes_n++;
         }