diff --git a/lib/CodeGen/CGVTables.cpp b/lib/CodeGen/CGVTables.cpp
index 73a69b1..b7ddc97 100644
--- a/lib/CodeGen/CGVTables.cpp
+++ b/lib/CodeGen/CGVTables.cpp
@@ -813,8 +813,12 @@
   EmitVTableDefinition(VTable, Linkage, RD);
 
   if (RD->getNumVBases()) {
-    llvm::GlobalVariable *VTT = GetAddrOfVTT(RD);
-    EmitVTTDefinition(VTT, Linkage, RD);
+    if (!CGM.getTarget().getCXXABI().isMicrosoft()) {
+      llvm::GlobalVariable *VTT = GetAddrOfVTT(RD);
+      EmitVTTDefinition(VTT, Linkage, RD);
+    } else {
+      // FIXME: Emit vbtables here.
+    }
   }
 
   // If this is the magic class __cxxabiv1::__fundamental_type_info,