diff --git a/python/llm/src/ipex_llm/transformers/convert.py b/python/llm/src/ipex_llm/transformers/convert.py
index 05b21e0a..16abd567 100644
--- a/python/llm/src/ipex_llm/transformers/convert.py
+++ b/python/llm/src/ipex_llm/transformers/convert.py
@@ -739,6 +739,8 @@ def _optimize_pre(model, qtype=None):
     if model.config.model_type == "internlmxcomposer2":
         from ipex_llm.transformers.models.internlm import pre_process_attn_and_mlp
         model.apply(pre_process_attn_and_mlp)
+    if model.config.model_type == "internvl_chat":
+        _optimize_pre(model.language_model)
     if model.config.model_type == "gemma2":
         from ipex_llm.transformers.models.gemma2 import merge_qkv
         model.apply(merge_qkv)
@@ -1268,6 +1270,7 @@ def _optimize_post(model, lightweight_bmm=False):
             from ipex_llm.transformers.models.internvl import _get_pos_embed
             vision_embedding = model.vision_model.embeddings
             vision_embedding._get_pos_embed = MethodType(_get_pos_embed, vision_embedding)
+        _optimize_post(model.language_model, lightweight_bmm=lightweight_bmm)
     elif model.config.model_type == "qwen":
         if hasattr(model.config, "visual"):
             # for Qwen-VL-Chat