diff --git a/llama.cpp b/llama.cpp
index 4225f9555..c46958a56 100644
--- a/llama.cpp
+++ b/llama.cpp
@@ -13349,7 +13349,7 @@ int32_t llama_token_to_piece(const struct llama_model * model, llama_token token
             } else if (llama_is_user_defined_token(model->vocab, token)) {
                 std::string result = model->vocab.id_to_token[token].text;
                 if (length < (int) result.length()) {
-                    return -result.length();
+                    return -(int) result.length();
                 }
                 memcpy(buf, result.c_str(), result.length());
                 return result.length();
@@ -13384,7 +13384,7 @@ int32_t llama_token_to_piece(const struct llama_model * model, llama_token token
             } else if (llama_is_user_defined_token(model->vocab, token)) {
                 std::string result = model->vocab.id_to_token[token].text;
                 if (length < (int) result.length()) {
-                    return -result.length();
+                    return -(int) result.length();
                 }
                 memcpy(buf, result.c_str(), result.length());
                 return result.length();