diff --git a/.gitignore b/.gitignore
index 6a5d91780..a19f09889 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ target/
 .classpath
 .project
 .settings
+.externalToolBuilders
 *.log
 vf.gf.*
 out/