diff --git a/.gitignore b/.gitignore
index b60d23b917..411c87d2c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,6 +42,8 @@ uptime-*.json
 # Core files
 core
 core.*
+# ccls file that can be per directory.
+*.ccls
 
 # /
 /Makefile