diff --git a/src/arch/power/isa/bitfields.isa b/src/arch/power/isa/bitfields.isa
index 8783081e26..dfe4683dcf 100644
--- a/src/arch/power/isa/bitfields.isa
+++ b/src/arch/power/isa/bitfields.isa
@@ -44,6 +44,7 @@ def bitfield XFL_XO        <10:1>;
 def bitfield XFX_XO        <10:1>;
 def bitfield XL_XO         <10:1>;
 def bitfield XO_XO         <9:1>;
+def bitfield XS_XO         <10:2>;
 
 // Register fields
 def bitfield RA            <20:16>;
diff --git a/src/arch/power/types.hh b/src/arch/power/types.hh
index 8700222cad..41b166fec4 100644
--- a/src/arch/power/types.hh
+++ b/src/arch/power/types.hh
@@ -47,6 +47,7 @@ BitUnion32(ExtMachInst)
 
     // Shifts and masks
     Bitfield<15, 11> sh;
+    Bitfield<1>      shn;
     Bitfield<10,  6> mb;
     Bitfield< 5,  1> me;