diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index 1f03fb2..456286c 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -257,7 +257,7 @@
 {
 	struct proc_dir_entry *entry;
 
-	if (_machine != PLATFORM_PSERIES && _machine != PLATFORM_PSERIES_LPAR)
+	if (!machine_is(pseries))
 		return 1;
 
 	rtas_node = of_find_node_by_name(NULL, "rtas");