diff --git a/cpp/common.cpp b/cpp/common.cpp
index 1b4f9d4..667cd0f 100644
--- a/cpp/common.cpp
+++ b/cpp/common.cpp
@@ -1001,8 +1001,10 @@ struct llama_model_params common_model_params_to_llama(const common_params & par
         mparams.kv_overrides = params.kv_overrides.data();
     }
 
-    mparams.progress_callback = params.progress_callback;
-    mparams.progress_callback_user_data = params.progress_callback_user_data;
+    if (params.progress_callback != nullptr) {
+        mparams.progress_callback = params.progress_callback;
+        mparams.progress_callback_user_data = params.progress_callback_user_data;
+    }
 
     return mparams;
 }
diff --git a/cpp/common.h b/cpp/common.h
index 4070df2..38649e7 100644
--- a/cpp/common.h
+++ b/cpp/common.h
@@ -282,8 +282,8 @@ struct common_params {
     bool warmup            = true;  // warmup run
     bool check_tensors     = false; // validate tensor data
 
-    llama_progress_callback progress_callback;
-    void * progress_callback_user_data;
+    llama_progress_callback progress_callback = nullptr;
+    void * progress_callback_user_data = nullptr;
 
     std::string cache_type_k = "f16"; // KV cache data type for the K
     std::string cache_type_v = "f16"; // KV cache data type for the V
diff --git a/scripts/common.cpp.patch b/scripts/common.cpp.patch
index 543397e..44268d4 100644
--- a/scripts/common.cpp.patch
+++ b/scripts/common.cpp.patch
@@ -1,5 +1,5 @@
---- common.cpp.orig	2024-11-21 11:03:19
-+++ common.cpp	2024-11-21 11:03:20
+--- common.cpp.orig	2024-12-20 13:06:22
++++ common.cpp	2024-12-20 13:05:42
 @@ -4,10 +4,6 @@
 
  #include "common.h"
@@ -42,20 +42,23 @@
      mparams.rpc_servers     = params.rpc_servers.c_str();
      mparams.main_gpu        = params.main_gpu;
      mparams.split_mode      = params.split_mode;
-@@ -999,6 +1001,9 @@
+@@ -999,6 +1001,11 @@
          mparams.kv_overrides = params.kv_overrides.data();
      }
 
-+    mparams.progress_callback = params.progress_callback;
-+    mparams.progress_callback_user_data = params.progress_callback_user_data;
++    if (params.progress_callback != nullptr) {
++        mparams.progress_callback = params.progress_callback;
++        mparams.progress_callback_user_data = params.progress_callback_user_data;
++    }
 +
      return mparams;
  }
 
-@@ -1124,220 +1129,6 @@
+@@ -1123,221 +1130,7 @@
+
      return false;
  }
-
+-
 -static bool common_download_file(const std::string & url, const std::string & path, const std::string & hf_token) {
 -
 -    // Initialize libcurl
@@ -95,7 +98,7 @@
 -    nlohmann::json metadata;
 -    std::string etag;
 -    std::string last_modified;
--
+
 -    if (file_exists) {
 -        // Try and read the JSON metadata file (note: stream autoclosed upon exiting this block).
 -        std::ifstream metadata_in(metadata_path);
diff --git a/scripts/common.h.patch b/scripts/common.h.patch
index 26b4253..0f6b0a0 100644
--- a/scripts/common.h.patch
+++ b/scripts/common.h.patch
@@ -1,5 +1,5 @@
---- common.h.orig	2024-11-21 10:21:53
-+++ common.h	2024-11-21 10:23:00
+--- common.h.orig	2024-12-20 13:06:22
++++ common.h	2024-12-20 13:05:53
 @@ -41,6 +41,17 @@
 
  struct common_control_vector_load_info;
@@ -30,8 +30,8 @@
      bool warmup            = true;  // warmup run
      bool check_tensors     = false; // validate tensor data
 
-+    llama_progress_callback progress_callback;
-+    void * progress_callback_user_data;
++    llama_progress_callback progress_callback = nullptr;
++    void * progress_callback_user_data = nullptr;
 +
      std::string cache_type_k = "f16"; // KV cache data type for the K
      std::string cache_type_v = "f16"; // KV cache data type for the V