diff --git a/hphp/runtime/base/file_repository.cpp b/hphp/runtime/base/file_repository.cpp
index 45197e889..7ef62d42f 100644
--- a/hphp/runtime/base/file_repository.cpp
+++ b/hphp/runtime/base/file_repository.cpp
@@ -58,7 +58,7 @@ PhpFile::PhpFile(const string &fileName, const string &srcRoot,
 
 PhpFile::~PhpFile() {
   always_assert(getRef() == 0);
-  if (m_unit != nullptr) {
+  if (!memory_profiling && m_unit != nullptr) {
     // Deleting a Unit can grab a low-ranked lock and we're probably
     // at a high rank right now
     PendQ::defer(new DeferredDeleter<Unit>(m_unit));