diff --git a/tools/.cvsignore b/tools/.cvsignore
index 7edaf98a0459f19b8d50e2620114d15aec9f06c1..4301dc41503517c3aa907d0d590e565d706a6e8a 100644
--- a/tools/.cvsignore
+++ b/tools/.cvsignore
@@ -1,4 +1,5 @@
 *.d
 Makefile
 nettle-lfib-stream
+pkcs1-conv
 sexp-conv
diff --git a/tools/.gitignore b/tools/.gitignore
index bc6f198fded58719455b9f0dda07ba1bf5b4ab47..c7b3131207e3d2859f5bca893bcbc3c4c27f1051 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -1,4 +1,5 @@
 /*.d
 /Makefile
 /nettle-lfib-stream
+/pkcs1-conv
 /sexp-conv