diff --git a/modules/sd_hijack_clip.py b/modules/sd_hijack_clip.py
index b979ed6f9..945f7732d 100644
--- a/modules/sd_hijack_clip.py
+++ b/modules/sd_hijack_clip.py
@@ -295,6 +295,8 @@ class FrozenCLIPEmbedderWithCustomWords(FrozenCLIPEmbedderWithCustomWordsBase):
         return tokenized
 
     def encode_with_transformers(self, tokens):
+        if opts.CLIP_stop_at_last_layers is None:
+            opts.CLIP_stop_at_last_layers = 1
         outputs = self.wrapped.transformer(input_ids=tokens, output_hidden_states=-opts.CLIP_stop_at_last_layers)
 
         if opts.CLIP_stop_at_last_layers > 1: