diff --git a/tools/profiler/core/ProfileBufferEntry.h b/tools/profiler/core/ProfileBufferEntry.h
index cda7df95b490..0a18392ecf9d 100644
--- a/tools/profiler/core/ProfileBufferEntry.h
+++ b/tools/profiler/core/ProfileBufferEntry.h
@@ -170,8 +170,6 @@ public:
   };
 
   struct FrameKey {
-    // This cannot be a std::string, as it is not memmove compatible, which
-    // is used by nsHashTable
     const nsCString mLocation;
     const mozilla::Maybe<unsigned> mLine;
     const mozilla::Maybe<unsigned> mCategory;