diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 782dc6d9b7fb3ac1015e32041e53cfed0c81b3fe..4b12f944ca4442fa321571dd9f182443fe1d7deb 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1464,6 +1464,8 @@
 	gpio-mockup.gpio_mockup_ranges
 			[HW] Sets the ranges of gpiochip of for this device.
 			Format: <start1>,<end1>,<start2>,<end2>...
+	gpio-mockup.gpio_mockup_named_lines
+			[HW] Let the driver know GPIO lines should be named.
 
 	gpt		[EFI] Forces disk with valid GPT signature but
 			invalid Protective MBR to be treated as GPT. If the