diff --git a/lib/Target/PowerPC/PPCInstrFormats.td b/lib/Target/PowerPC/PPCInstrFormats.td
index 7e54786f8c8..bec1c5d3367 100644
--- a/lib/Target/PowerPC/PPCInstrFormats.td
+++ b/lib/Target/PowerPC/PPCInstrFormats.td
@@ -56,6 +56,7 @@ class PPC32I<string name, bits<6> opcode, bit ppc64, bit vmx> : Instruction {
 
   let Name = name;
   let Namespace = "PPC32";
+  let ClassPrefix = "PowerPC";
   let Inst{0-5} = opcode;
 }