diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index 2887c8b2ac5..f6b1789c9ee 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -104,6 +104,9 @@ options 	KSTACK_PAGES=3		# number of 4k stack pages per process
 #
 options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
 
+#options	GEOM			# Use the GEOMetry system for
+					# disk-I/O transformations.
+
 #
 # The root device and filesystem type can be compiled in;
 # this provides a fallback option if the root device cannot
diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES
index 2887c8b2ac5..f6b1789c9ee 100644
--- a/sys/i386/conf/NOTES
+++ b/sys/i386/conf/NOTES
@@ -104,6 +104,9 @@ options 	KSTACK_PAGES=3		# number of 4k stack pages per process
 #
 options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
 
+#options	GEOM			# Use the GEOMetry system for
+					# disk-I/O transformations.
+
 #
 # The root device and filesystem type can be compiled in;
 # this provides a fallback option if the root device cannot