diff --git a/opencv-webcam-demo/opencv-webcam-demo.cpp b/opencv-webcam-demo/opencv-webcam-demo.cpp
index 9a7a960..10b7a33 100644
--- a/opencv-webcam-demo/opencv-webcam-demo.cpp
+++ b/opencv-webcam-demo/opencv-webcam-demo.cpp
@@ -64,7 +64,7 @@ std::string getAsJson(const std::map<FaceId, Face> faces, const double timeStamp
         }
 
         values = (float *)&f.expressions;
-        for (std::string expression : expressions = {
+        for (std::string expression : {
             "smile", "innerBrowRaise", "browRaise", "browFurrow", "noseWrinkle",
             "upperLipRaise", "lipCornerDepressor", "chinRaise", "lipPucker", "lipPress",
             "lipSuck", "mouthOpen", "smirk", "eyeClosure", "attention", "eyeWiden", "cheekRaise",