diff --git a/python/tvm/relay/frontend/mxnet.py b/python/tvm/relay/frontend/mxnet.py
index 5642c4122580..97b9d7a44997 100644
--- a/python/tvm/relay/frontend/mxnet.py
+++ b/python/tvm/relay/frontend/mxnet.py
@@ -913,9 +913,9 @@ def _mx_amp_multicast(inputs, attrs):
     has_float32 = any(x == "float32" for x in dtypes)
     dtype = dtypes[0]
     if cast_narrow and has_float16:
-       dtype = 'float16'
+        dtype = 'float16'
     if not cast_narrow and has_float32:
-       dtype = 'float32'
+        dtype = 'float32'
     return [_op.cast(x, dtype) for x in inputs]
 
 def _mx_grid_generator(inputs, attrs):