diff --git a/tree/tree/src/TBranchSTL.cxx b/tree/tree/src/TBranchSTL.cxx
index 226b721253a86242b6da01828afe37a1f7d31aaa..4401e5c46c9d3d1b183183dd2f035e4f64339011 100644
--- a/tree/tree/src/TBranchSTL.cxx
+++ b/tree/tree/src/TBranchSTL.cxx
@@ -584,10 +584,6 @@ TStreamerInfo* TBranchSTL::GetInfo() const
             }
          }
       }
-      if((*fInfo).IsOptimized()) {
-	(*fInfo).SetBit(TVirtualStreamerInfo::kCannotOptimize);
-	(*fInfo).BuildOld();
-      }
    }
    return fInfo;
 }