diff --git a/common/arg.cpp b/common/arg.cpp
index a72c90bfa..57b0d562a 100644
--- a/common/arg.cpp
+++ b/common/arg.cpp
@@ -1636,7 +1636,7 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
         [](common_params & params, const std::string & value) {
             params.speculative.hf_repo = value;
         }
-    ).set_env("LLAMA_ARG_HF_REPO"));
+    ).set_env("LLAMA_ARG_HFD_REPO"));
     add_opt(common_arg(
         {"-hff", "--hf-file"}, "FILE",
         "Hugging Face model file. If specified, it will override the quant in --hf-repo (default: unused)",