diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5efebfd1cfdf7edbf3a7b963633e50120a0c4b5c..248fe9da0b26f06f4d002896f8d0847a7097fc4c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1043,7 +1043,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			debugfs files are removed at module unload time.
 
 	gpt		[EFI] Forces disk with valid GPT signature but
-			invalid Protective MBR to be treated as GPT.
+			invalid Protective MBR to be treated as GPT. If the
+			primary GPT is corrupted, it enables the backup/alternate
+			GPT to be used instead.
 
 	grcan.enable0=	[HW] Configuration of physical interface 0. Determines
 			the "Enable 0" bit of the configuration register.