diff --git a/samples/openvx/no_wrappers.cpp b/samples/openvx/no_wrappers.cpp
index 99a8ecab82..7809f7b9ca 100644
--- a/samples/openvx/no_wrappers.cpp
+++ b/samples/openvx/no_wrappers.cpp
@@ -27,6 +27,13 @@ enum UserMemoryMode
     COPY, USER_MEM
 };
 
+vx_image convertCvMatToVxImage(vx_context context, cv::Mat image, bool toCopy);
+cv::Mat copyVxImageToCvMat(vx_image ovxImage);
+void swapVxImage(vx_image ovxImage);
+vx_status createProcessingGraph(vx_image inputImage, vx_image outputImage, vx_graph& graph);
+int ovxDemo(std::string inputPath, UserMemoryMode mode);
+
+
 vx_image convertCvMatToVxImage(vx_context context, cv::Mat image, bool toCopy)
 {
     if (!(!image.empty() && image.dims <= 2 && image.channels() == 1))
diff --git a/samples/openvx/wrappers.cpp b/samples/openvx/wrappers.cpp
index 32a1442c55..b591862c10 100644
--- a/samples/openvx/wrappers.cpp
+++ b/samples/openvx/wrappers.cpp
@@ -15,6 +15,10 @@ enum UserMemoryMode
     COPY, USER_MEM, MAP
 };
 
+ivx::Graph createProcessingGraph(ivx::Image& inputImage, ivx::Image& outputImage);
+int ovxDemo(std::string inputPath, UserMemoryMode mode);
+
+
 ivx::Graph createProcessingGraph(ivx::Image& inputImage, ivx::Image& outputImage)
 {
     using namespace ivx;
diff --git a/samples/openvx/wrappers_video.cpp b/samples/openvx/wrappers_video.cpp
index 35caa2844c..737f052b85 100644
--- a/samples/openvx/wrappers_video.cpp
+++ b/samples/openvx/wrappers_video.cpp
@@ -15,6 +15,10 @@ enum UserMemoryMode
     COPY, USER_MEM, MAP
 };
 
+ivx::Graph createProcessingGraph(ivx::Image& inputImage, ivx::Image& outputImage);
+int ovxDemo(std::string inputPath, UserMemoryMode mode);
+
+
 ivx::Graph createProcessingGraph(ivx::Image& inputImage, ivx::Image& outputImage)
 {
     using namespace ivx;