diff --git a/Writing-your-own-publisher.md b/Writing-your-own-publisher.md
index 7edb9b4..7939eac 100644
--- a/Writing-your-own-publisher.md
+++ b/Writing-your-own-publisher.md
@@ -31,7 +31,6 @@ public:
 
 private:
   size_t num_cameras_;
-  std::vector<cv::Size> sensor_sizes_;
   std::ofstream events_text_file_;
 };