diff --git a/lib/MC/MCMachObjectTargetWriter.cpp b/lib/MC/MCMachObjectTargetWriter.cpp
index 9c96f26..4dfc0a8 100644
--- a/lib/MC/MCMachObjectTargetWriter.cpp
+++ b/lib/MC/MCMachObjectTargetWriter.cpp
@@ -11,7 +11,9 @@
 
 using namespace llvm;
 
-MCMachObjectTargetWriter::MCMachObjectTargetWriter() {
+MCMachObjectTargetWriter::MCMachObjectTargetWriter(
+  bool Is64Bit_, uint32_t CPUType_, uint32_t CPUSubtype_)
+  : Is64Bit(Is64Bit_), CPUType(CPUType_), CPUSubtype(CPUSubtype_) {
 }
 
 MCMachObjectTargetWriter::~MCMachObjectTargetWriter() {