diff --git a/norch/csrc/distributed.cpp b/norch/csrc/distributed.cpp
index 5239eaa..bb753b2 100644
--- a/norch/csrc/distributed.cpp
+++ b/norch/csrc/distributed.cpp
@@ -35,12 +35,12 @@ void init_process_group(int env_rank, int env_world_size) {
 
 }
 
-void broadcast_tensor(Tensor* tensor) {
+void broadcast_tensor(Tensor* tensor, int src) {
 
     cudaStream_t stream;
     cudaStreamCreate(&stream);
     
-    NCCL_CHECK(ncclBroadcast(tensor->data, tensor->data, tensor->size * sizeof(float), ncclFloat, 0, nccl_comm, stream));
+    NCCL_CHECK(ncclBroadcast(tensor->data, tensor->data, tensor->size * sizeof(float), ncclFloat, src, nccl_comm, stream));
     cudaStreamSynchronize(stream);
     cudaStreamDestroy(stream);
 }
diff --git a/norch/csrc/distributed.h b/norch/csrc/distributed.h
index 3a94983..53e318e 100644
--- a/norch/csrc/distributed.h
+++ b/norch/csrc/distributed.h
@@ -22,7 +22,7 @@
 
 extern "C" {
   void init_process_group(int rank, int world_size);
-  void broadcast_tensor(Tensor* tensor);
+  void broadcast_tensor(Tensor* tensor, int src);
   void allreduce_sum_tensor(Tensor* tensor);
   void allreduce_mean_tensor(Tensor* tensor);
 }
diff --git a/norch/distributed/distributed.py b/norch/distributed/distributed.py
index f84a7fa..bd87bc3 100644
--- a/norch/distributed/distributed.py
+++ b/norch/distributed/distributed.py
@@ -9,12 +9,12 @@ def init_process_group(rank, world_size, backend='nccl'):
 
     Tensor._C.init_process_group(rank, world_size)
 
-def broadcast_tensor(tensor):
+def broadcast_tensor(tensor, src=0):
 
-    Tensor._C.broadcast_tensor.argtypes = [ctypes.POINTER(CTensor)]
+    Tensor._C.broadcast_tensor.argtypes = [ctypes.POINTER(CTensor), ctypes.c_int]
     Tensor._C.broadcast_tensor.restype = None
     
-    Tensor._C.broadcast_tensor(tensor.tensor)
+    Tensor._C.broadcast_tensor(tensor.tensor, src)
 
 def allreduce_sum_tensor(tensor):