diff --git a/include/llvm/Analysis/CaptureTracking.h b/include/llvm/Analysis/CaptureTracking.h
index b49646b2a25..01eca6041ea 100644
--- a/include/llvm/Analysis/CaptureTracking.h
+++ b/include/llvm/Analysis/CaptureTracking.h
@@ -37,6 +37,8 @@ namespace llvm {
   /// addition to the interface here, you'll need to provide your own getters
   /// to see whether anything was captured.
   struct CaptureTracker {
+    virtual ~CaptureTracker();
+
     /// tooManyUses - The depth of traversal has breached a limit. There may be
     /// capturing instructions that will not be passed into captured().
     virtual void tooManyUses() = 0;
diff --git a/lib/Analysis/CaptureTracking.cpp b/lib/Analysis/CaptureTracking.cpp
index 9be00971dc6..03bd70dfa34 100644
--- a/lib/Analysis/CaptureTracking.cpp
+++ b/lib/Analysis/CaptureTracking.cpp
@@ -19,6 +19,8 @@
 #include "llvm/Analysis/CaptureTracking.h"
 using namespace llvm;
 
+CaptureTracker::~CaptureTracker() {}
+
 namespace {
   struct SimpleCaptureTracker : public CaptureTracker {
     explicit SimpleCaptureTracker(bool ReturnCaptures)