1 files changed, 4 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 1c88ec35500a..e70ebfee9c80 100644
--- a/Makefile
+++ b/Makefile
@@ -995,7 +995,10 @@ MRPROPER_DIRS  += include/config usr/include include/generated          \
                   arch/*/include/generated
 MRPROPER_FILES += .config .config.old .version .old_version             \
                   include/linux/version.h                               \
-                  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
+                  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
+                  signing_key.priv signing_key.x509 x509.genkey         \
+                  extra_certificates signing_key.x509.keyid             \
+                  signing_key.x509.signer
 
 # clean - Delete most, but leave enough to build external modules
 #