diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 90b3924..9b9566b 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1650,6 +1650,12 @@
 	oprofile.timer=	[HW]
 			Use timer interrupt instead of performance counters
 
+	oprofile.force_arch_perfmon=1	[X86]
+			Force use of architectural perfmon instead of
+			the CPU specific event set.
+			This might be useful if you have older oprofile
+			userland or if you want common events over Intel CPUs.
+
 	osst=		[HW,SCSI] SCSI Tape Driver
 			Format: <buffer_size>,<write_threshold>
 			See also Documentation/scsi/st.txt.