diff --git a/numpy/ma/core.py b/numpy/ma/core.py
index b5371f51a6bc..0fdb779eb0e9 100644
--- a/numpy/ma/core.py
+++ b/numpy/ma/core.py
@@ -2844,7 +2844,8 @@ def __new__(cls, data=None, mask=nomask, dtype=None, copy=False,
         # Process mask.
         # Type of the mask
         mdtype = make_mask_descr(_data.dtype)
-
+        # Set mask as False if it is None for performance improvement.
+        if mask is None: mask = False
         if mask is nomask:
             # Case 1. : no mask in input.
             # Erase the current mask ?