diff --git a/README.md b/README.md
index d0d0c9f..2b5ed75 100755
--- a/README.md
+++ b/README.md
@@ -13,8 +13,7 @@ cool, I'd love to hear about it!
 
 ## Install
 
-You'll need OpenCV 2.3.1 or newer installed before installing node-opencv.  Note
-that OpenCV 3.x is not yet fully supported.
+You'll need OpenCV 2.3.1 or newer installed before installing node-opencv.
 
 ## Specific for macOS
 Install OpenCV using brew
diff --git a/src/FaceRecognizer.h b/src/FaceRecognizer.h
index a147229..8e75253 100644
--- a/src/FaceRecognizer.h
+++ b/src/FaceRecognizer.h
@@ -8,6 +8,7 @@ namespace cv {
   using cv::face::FaceRecognizer;
 }
 #else
+#warning using opencv2 contrib
 #include "opencv2/contrib/contrib.hpp"
 #endif
 
diff --git a/utils/find-opencv.js b/utils/find-opencv.js
index ece7a66..be1cfa8 100644
--- a/utils/find-opencv.js
+++ b/utils/find-opencv.js
@@ -2,7 +2,14 @@
 
 var exec = require("child_process").exec;
 var fs = require("fs");
-var flag = "--exists";
+
+var flags = {
+  '--cflags' : '--cflags',
+  '--libs' : '--libs'
+}
+var flag = flags[process.argv[2]] || '--exists'
+
+
 
 // Normally |pkg-config opencv ...| could report either OpenCV 2.x or OpenCV 3.y
 // depending on what is installed.  To enable both 2.x and 3.y to co-exist on