diff --git a/.gitignore b/.gitignore
index 4ad4a98..17fa24d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -97,6 +97,7 @@
 # Leavings from module signing
 #
 extra_certificates
+signing_key.pem
 signing_key.priv
 signing_key.x509
 x509.genkey