diff --git a/app/src/main/cpp/camera2/ndkcamera.cpp b/app/src/main/cpp/camera2/ndkcamera.cpp
index c5270a17..70354512 100644
--- a/app/src/main/cpp/camera2/ndkcamera.cpp
+++ b/app/src/main/cpp/camera2/ndkcamera.cpp
@@ -765,6 +765,7 @@ void NdkCamera::onImageAvailable(AImageReader* reader)
     if (mstatus != AMEDIA_OK)
     {
         // error
+        // https://stackoverflow.com/questions/67063562
         if (mstatus != AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE)
         {
             XYLOG(XYLOG_SEVERITY_ERROR, "AImageReader_acquireLatestImage error: %d", mstatus);