diff --git a/code/C++/FIFO_w_OpenCV/reader.cpp b/code/C++/FIFO_w_OpenCV/reader.cpp
index c75b28d..e855fcf 100644
--- a/code/C++/FIFO_w_OpenCV/reader.cpp
+++ b/code/C++/FIFO_w_OpenCV/reader.cpp
@@ -10,9 +10,6 @@
 #include <opencv2/opencv.hpp>
 
 #define FIFO_NAME "cvMat"
-#define MAX_BUF 150 * 150 * 4
-
-using namespace cv;
 
 int main() {
   unsigned int timeout_seconds = 2;
@@ -44,7 +41,7 @@ int main() {
           while ((bytesRead = read(fd, tempBuff, sizeof(tempBuff))) > 0) buff.insert(buff.end(), tempBuff, tempBuff + bytesRead);
           printf("Received: %d\n", buff.size());
 
-          Mat img(cv::Size(810, 1080), CV_8UC3, buff.data());
+          cv::Mat img(cv::Size(810, 1080), CV_8UC3, buff.data());
           cv::imwrite("received.jpg", img);
         } else if (waiter.revents & POLLERR) {
           puts("Got a POLLERR");