diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index df4a3d0..422eb3b 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -36,7 +36,8 @@
                              Diagnostic &diags, bool GenerateDebugInfo)
   : Context(C), Features(LO), TheModule(M), TheTargetData(TD), Diags(diags),
     Types(C, M, TD), Runtime(0), MemCpyFn(0), MemMoveFn(0), MemSetFn(0),
-    CFConstantStringClassRef(0), NSConcreteGlobalBlock(0) {
+    CFConstantStringClassRef(0), NSConcreteGlobalBlock(0),
+    BlockDescriptorType(0) {
 
   if (Features.ObjC1) {
     if (Features.NeXTRuntime) {