diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 98d1e0a..9b6f61e 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -308,7 +308,8 @@
   AnalysisID addPass(AnalysisID PassID);
 
   /// Add a pass to the PassManager if that pass is supposed to be run, as
-  /// determined by the StartAfter and StopAfter options.
+  /// determined by the StartAfter and StopAfter options. Takes ownership of the
+  /// pass.
   void addPass(Pass *P);
 
   /// addMachinePasses helper to create the target-selected or overriden
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 203eec0..c0861c5 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -300,6 +300,8 @@
 
   if (Started && !Stopped)
     PM->add(P);
+  else
+    delete P;
   if (StopAfter == PassID)
     Stopped = true;
   if (StartAfter == PassID)