diff --git a/lgtm.yml b/lgtm.yml
index f9e1a35fb1..2c94567ce8 100644
--- a/lgtm.yml
+++ b/lgtm.yml
@@ -9,6 +9,7 @@ extraction:
         - texinfo
         - flex
         - bison
+        - g++
         - gawk
         - build-essential
         - unzip