diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index 6dd64de..0d5b2a3 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -96,6 +96,8 @@
     return TargetIsIPhoneOS;
   }
 
+  bool isTargetInitialized() const { return TargetInitialized; }
+
   void getTargetVersion(unsigned (&Res)[3]) const {
     assert(TargetInitialized && "Target not initialized!");
     Res[0] = TargetVersion[0];
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 86b4685..58a4cdb 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -655,6 +655,12 @@
   } else {
     const toolchains::Darwin &DarwinTC(
       reinterpret_cast<const toolchains::Darwin&>(TC));
+
+    // If the target isn't initialized (e.g., an unknown Darwin platform, return
+    // the default triple).
+    if (!DarwinTC.isTargetInitialized())
+      return Triple.getTriple();
+    
     unsigned Version[3];
     DarwinTC.getTargetVersion(Version);