diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 24fb35c215c..78fc28ec111 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -1305,6 +1305,7 @@ void FunctionPassManagerImpl::releaseMemoryOnTheFly() {
       FPPM->getContainedPass(Index)->releaseMemory();
     }
   }
+  wasRun = false;
 }
 
 // Execute all the passes managed by this top level manager.