diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index fb8752b42ec8..bf00552908bc 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6082,7 +6082,7 @@
 			is assumed to be I/O ports; otherwise it is memory.
 
 	reserve_mem=	[RAM]
-			Format: nn[KNG]:<align>:<label>
+			Format: nn[KMG]:<align>:<label>
 			Reserve physical memory and label it with a name that
 			other subsystems can use to access it. This is typically
 			used for systems that do not wipe the RAM, and this command