diff --git a/lib/Kconfig b/lib/Kconfig
index 38051cc..52d4b27 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -299,6 +299,9 @@
 	  the size is too small then the message which says the amount of early
 	  data being coped will the the same as the
 
+config CIRCBUF
+	bool "Enable circular buffer support"
+
 source lib/dhry/Kconfig
 
 menu "Security support"