diff --git a/keras_contrib/applications/nasnet.py b/keras_contrib/applications/nasnet.py
index 072172d..34f2e11 100644
--- a/keras_contrib/applications/nasnet.py
+++ b/keras_contrib/applications/nasnet.py
@@ -262,7 +262,7 @@ def NASNetLarge(input_shape=None,
                 dropout=0.5,
                 use_auxilary_branch=False,
                 include_top=True,
-                weights='imagenet',
+                weights=None,
                 input_tensor=None,
                 pooling=None,
                 classes=1000):
@@ -333,7 +333,7 @@ def NASNetMobile(input_shape=None,
                  dropout=0.5,
                  use_auxilary_branch=False,
                  include_top=True,
-                 weights='imagenet',
+                 weights=None,
                  input_tensor=None,
                  pooling=None,
                  classes=1000):