diff --git a/lib/Kconfig b/lib/Kconfig
index e5c2c51..ba3d104 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -138,4 +138,7 @@
 	depends on !NO_DMA
 	default y
 
+config CHECK_SIGNATURE
+	bool
+
 endmenu