diff --git a/tools/.gitignore b/tools/.gitignore
index 07e181fc8db78f94be1011621c8508b62e21a88e..b9366085326a3729a79789bebbfa9b57029d8580 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -4,3 +4,4 @@
 /nettle-lfib-stream
 /pkcs1-conv
 /sexp-conv
+/nettle-pbkdf2