diff --git a/common/arg.cpp b/common/arg.cpp
index 943d0766f..c21598e76 100644
--- a/common/arg.cpp
+++ b/common/arg.cpp
@@ -3499,7 +3499,7 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
     ).set_spec().set_examples({LLAMA_EXAMPLE_SPECULATIVE, LLAMA_EXAMPLE_LOOKUP, LLAMA_EXAMPLE_SERVER, LLAMA_EXAMPLE_CLI}).set_env("LLAMA_ARG_SPEC_DRAFT_N_MIN"));
 
     add_opt(common_arg(
-        {"--spec--draft-p-split", "--draft-p-split"}, "P",
+        {"--spec-draft-p-split", "--draft-p-split"}, "P",
         string_format("speculative decoding split probability (default: %.2f)", (double)params.speculative.draft.p_split),
         [](common_params & params, const std::string & value) {
             params.speculative.draft.p_split = std::stof(value);