diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7a638aa..24a26ad 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1649,6 +1649,15 @@
 
 	  If unsure, say N.
 
+config TEST_UDELAY
+	tristate "udelay test driver"
+	default n
+	help
+	  This builds the "udelay_test" module that helps to make sure
+	  that udelay() is working properly.
+
+	  If unsure, say N.
+
 source "samples/Kconfig"
 
 source "lib/Kconfig.kgdb"