diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index c4790a2..d579d95 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -220,6 +220,7 @@
 TargetMachine::TargetMachine(const Target &T) 
   : TheTarget(T), AsmInfo(0),
     MCRelaxAll(false),
+    MCNoExecStack(false),
     MCUseLoc(true) {
   // Typically it will be subtargets that will adjust FloatABIType from Default
   // to Soft or Hard.