diff --git a/table/table.cc b/table/table.cc
index 394f65e7d..f5bc5f0cc 100644
--- a/table/table.cc
+++ b/table/table.cc
@@ -207,6 +207,9 @@ Iterator* Table::BlockReader(void* arg,
       if (s.ok()) {
         block = new Block(contents);
       }
+      if (didIO != NULL) {
+        *didIO = true; // we did some io from storage
+      }
     }
   }