diff --git a/.circleci/config.yml b/.circleci/config.yml
index d6f04292..12bbc65d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,7 +6,7 @@ jobs:
     working_directory: ~/work
     steps:
       - checkout
-      - run: make LIBSO=1
+      - run: make LIBSO=1 OPENCV=1
       - run: |
           ulimit -c unlimited
           ./darknet
diff --git a/src/yolo_console_dll.cpp b/src/yolo_console_dll.cpp
index a1db75c0..975adb16 100644
--- a/src/yolo_console_dll.cpp
+++ b/src/yolo_console_dll.cpp
@@ -8,7 +8,9 @@
 #include <mutex>              // std::mutex, std::unique_lock
 #include <condition_variable> // std::condition_variable
 
+#ifdef WIN32
 #define OPENCV
+#endif
 
 #include "yolo_v2_class.hpp"	// imported functions from DLL