diff --git a/text-generation-webui/custom_monkey_patch.py b/text-generation-webui/custom_monkey_patch.py
index 2e11db6..c59132e 100644
--- a/text-generation-webui/custom_monkey_patch.py
+++ b/text-generation-webui/custom_monkey_patch.py
@@ -24,7 +24,7 @@ def load_model_llama(*args, **kwargs):
     print('Apply auto switch and half')
     for n, m in model.named_modules():
         if isinstance(m, Autograd4bitQuantLinear) or isinstance(m, Linear4bitLt):
-            if m.groupsize == -1:
+            if m.is_v1_model:
                 m.zeros = m.zeros.half()
             m.scales = m.scales.half()
             m.bias = m.bias.half()