diff --git a/configs/fcos/_base_/fcos_reader.yml b/configs/fcos/_base_/fcos_reader.yml
index 8f0016125eb..4f4d4feffbf 100644
--- a/configs/fcos/_base_/fcos_reader.yml
+++ b/configs/fcos/_base_/fcos_reader.yml
@@ -16,6 +16,7 @@ TrainReader:
   batch_size: 2
   shuffle: True
   drop_last: True
+  use_shared_memory: True
 
 
 EvalReader: