diff --git a/oss-internship-2020/pffft/.gitignore b/oss-internship-2020/pffft/.gitignore
new file mode 100644
index 0000000..f9ed608
--- /dev/null
+++ b/oss-internship-2020/pffft/.gitignore
@@ -0,0 +1 @@
+.hg/