diff --git a/lib/libsys/x86/pkru.3 b/lib/libsys/x86/pkru.3
--- a/lib/libsys/x86/pkru.3
+++ b/lib/libsys/x86/pkru.3
@@ -79,9 +79,6 @@
 error code.
 Note that some side effects may have occurred if this error is reported.
 .Pp
-Protection keys require that the system uses 4-level paging
-(also called long mode),
-which means that it is only available on amd64 system.
 Both 64-bit and 32-bit applications can use protection keys.
 More information about the hardware feature is provided in the IA32 Software
 Developer's Manual published by Intel Corp.