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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 [![GitHub Build Status](https://github.com/inotify-tools/inotify-tools/workflows/build/badge.svg)](https://github.com/inotify-tools/inotify-tools/actions)
 [![Travis Build Status](https://travis-ci.org/inotify-tools/inotify-tools.svg?branch=master)](https://travis-ci.org/inotify-tools/inotify-tools)
 [![Cirrus Build Status](https://api.cirrus-ci.com/github/inotify-tools/inotify-tools.svg?branch=master)](https://cirrus-ci.com/github/inotify-tools/inotify-tools)
+[![Language Grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/inotify-tools/inotify-tools.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/inotify-tools/inotify-tools/context:cpp)
 
 inotify-tools
 =============