diff --git a/lib/Target/PowerPC/PPC64AsmPrinter.cpp b/lib/Target/PowerPC/PPC64AsmPrinter.cpp
index 37a1d07..74aaad5 100644
--- a/lib/Target/PowerPC/PPC64AsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPC64AsmPrinter.cpp
@@ -569,7 +569,7 @@
     return;
   }
 
-  O << TII.getName(Opcode) << " ";
+  O << LowercaseString(TII.getName(Opcode)) << " ";
   if (Opcode == PPC::BLR || Opcode == PPC::NOP) {
     O << "\n";
   } else if (ArgCount == 3 &&