diff --git a/lib/MC/MCAsmInfo.cpp b/lib/MC/MCAsmInfo.cpp
index 3e5c97d..6e8cd0c 100644
--- a/lib/MC/MCAsmInfo.cpp
+++ b/lib/MC/MCAsmInfo.cpp
@@ -19,7 +19,7 @@
 using namespace llvm;
 
 MCAsmInfo::MCAsmInfo() {
-  ZeroFillDirective = 0;
+  HasMachoZeroFillDirective = false;
   NonexecutableStackDirective = 0;
   NeedsSet = false;
   MaxInstLength = 4;
diff --git a/lib/MC/MCAsmInfoDarwin.cpp b/lib/MC/MCAsmInfoDarwin.cpp
index d99120d..8719bee 100644
--- a/lib/MC/MCAsmInfoDarwin.cpp
+++ b/lib/MC/MCAsmInfoDarwin.cpp
@@ -35,7 +35,7 @@
   HiddenDirective = "\t.private_extern ";
   LCOMMDirective = "\t.lcomm\t";
   ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
-  ZeroFillDirective = "\t.zerofill\t";  // Uses .zerofill
+  HasMachoZeroFillDirective = true;  // Uses .zerofill
   SetDirective = "\t.set";
   ProtectedDirective = "\t.globl\t";
   HasDotTypeDotSizeDirective = false;