diff --git a/.gitignore b/.gitignore
index 8535007bdb1..16c41bdbe9f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -99,6 +99,7 @@ GTAGS
 
 # Build files in the test directory
 /test/*.ok
+/test/ext/.d
 
 # vppctl command list
 /src/scripts/vppctl-cmd-list