diff --git a/include/llvm/Support/Dwarf.h b/include/llvm/Support/Dwarf.h
index 2a48f3c3076..f6d680b8b9d 100644
--- a/include/llvm/Support/Dwarf.h
+++ b/include/llvm/Support/Dwarf.h
@@ -411,6 +411,7 @@ enum dwarf_constants {
   DW_OP_call_ref = 0x9a,
   DW_OP_form_tls_address = 0x9b,
   DW_OP_call_frame_cfa = 0x9c,
+  DW_OP_bit_piece = 0x9d,
   DW_OP_lo_user = 0xe0,
   DW_OP_hi_user = 0xff,
 
diff --git a/lib/Support/Dwarf.cpp b/lib/Support/Dwarf.cpp
index 25cf531addb..74a9fda7ab6 100644
--- a/lib/Support/Dwarf.cpp
+++ b/lib/Support/Dwarf.cpp
@@ -395,6 +395,7 @@ const char *llvm::dwarf::OperationEncodingString(unsigned Encoding) {
   case DW_OP_call_ref:                   return "DW_OP_call_ref";
   case DW_OP_form_tls_address:           return "DW_OP_form_tls_address";
   case DW_OP_call_frame_cfa:             return "DW_OP_call_frame_cfa";
+  case DW_OP_bit_piece:                  return "DW_OP_bit_piece";
   case DW_OP_lo_user:                    return "DW_OP_lo_user";
   case DW_OP_hi_user:                    return "DW_OP_hi_user";
   }