diff --git a/modules/sd_models.py b/modules/sd_models.py
index 7e48c2328..3e0b577bb 100644
--- a/modules/sd_models.py
+++ b/modules/sd_models.py
@@ -469,6 +469,25 @@ def get_vae_dtype(state_dict=None, state_dict_dtype=None):
     return None
 
 
+def fix_position_ids(state_dict, force=False):
+    # for SD1.5 or some SDXL with position_ids
+    for prefix in ("cond_stage_models.", "conditioner.embedders.0."):
+        position_id_key = f"{prefix}transformer.text_model.embeddings.position_ids"
+        if position_id_key in state_dict:
+            original = state_dict[position_id_key]
+            if original.dtype == torch.int64:
+                return
+
+            if force:
+                # regenerate
+                fixed = torch.tensor([list(range(77))], dtype=torch.int64, device=original.device)
+            else:
+                fixed = state_dict[position_id_key].to(torch.int64)
+                print(f"Warning: Fixed position_ids dtype from {original.dtype} to {fixed.dtype}")
+
+            state_dict[position_id_key] = fixed
+
+
 def load_model_weights(model, checkpoint_info: CheckpointInfo, state_dict, timer):
     sd_model_hash = checkpoint_info.calculate_shorthash()
     timer.record("calculate hash")
@@ -490,6 +509,9 @@ def load_model_weights(model, checkpoint_info: CheckpointInfo, state_dict, timer
     else:
         model.ztsnr = False
 
+    fix_position_ids(state_dict)
+
+
     if model.is_sdxl:
         sd_models_xl.extend_sdxl(model)