diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 63bda3637085..98cf90f2631d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -994,6 +994,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
 	mce		[X86-32] Machine Check Exception
 
+	mce=option	[X86-64] See Documentation/x86_64/boot-options.txt
+
 	md=		[HW] RAID subsystems devices and level
 			See Documentation/md.txt.
 
diff --git a/arch/x86/kernel/mce_64.c b/arch/x86/kernel/mce_64.c
index 97d2b757d6bd..8ca8f8648969 100644
--- a/arch/x86/kernel/mce_64.c
+++ b/arch/x86/kernel/mce_64.c
@@ -695,8 +695,6 @@ static int __init mcheck_disable(char *str)
    mce=nobootlog Don't log MCEs from before booting. */
 static int __init mcheck_enable(char *str)
 {
-	if (*str == '=')
-		str++;
 	if (!strcmp(str, "off"))
 		mce_dont_init = 1;
 	else if (!strcmp(str, "bootlog") || !strcmp(str,"nobootlog"))
@@ -709,7 +707,7 @@ static int __init mcheck_enable(char *str)
 }
 
 __setup("nomce", mcheck_disable);
-__setup("mce", mcheck_enable);
+__setup("mce=", mcheck_enable);
 
 /* 
  * Sysfs support