diff --git a/.gitignore b/.gitignore
index 19199b1b7cc4df87d0f924cdfed5e2abee006b38..5805b27d43687d5e212e0fd9b149f69821fff7ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,3 +51,4 @@ doc
 /build3/
 /cov-int/
 /.vs/
+/build-mtls/