diff --git a/projects/rccl/src/collectives/device/common.h b/projects/rccl/src/collectives/device/common.h
index 0d9cd3b734..a7ebcad5b1 100644
--- a/projects/rccl/src/collectives/device/common.h
+++ b/projects/rccl/src/collectives/device/common.h
@@ -11,7 +11,7 @@
 #include "collectives.h"
 #include "devcomm.h"
 
-#define COLL_UNROLL 2
+#define COLL_UNROLL 4
 #define NCCL_MAX_DEV_ARITY (NCCL_MAX_TREE_ARITY-1)  // Using balanced tree instead of split tree
 
 #define __syncwarp()