diff --git a/security/Makefile b/security/Makefile
index 18121f8f85..8c589f9c36 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -2,6 +2,7 @@
 #
 # Makefile for the kernel security code
 #
+# TODO: Spectre v2 mitigation workaround.
 
 obj-$(CONFIG_KEYS)			+= keys/