diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 94581998..3b0b0f88 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -37,7 +37,7 @@ namespace Eval {
   UseNNUEMode useNNUE;
   std::string eval_file_loaded="None";
 
-  static UseNNUEMode nnue_mode_from_option(const std::string& mode)
+  static UseNNUEMode nnue_mode_from_option(const UCI::Option& mode)
   {
     if (mode == "false")
       return UseNNUEMode::False;
diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index 61e47539..91fa199b 100644
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -86,7 +86,7 @@ void init(OptionsMap& o) {
   o["SyzygyProbeDepth"]      << Option(1, 1, 100);
   o["Syzygy50MoveRule"]      << Option(true);
   o["SyzygyProbeLimit"]      << Option(7, 0, 7);
-#ifdef EVAL_LEARN
+#if defined(EVAL_LEARN)
   o["Use NNUE"]              << Option("true var true var false var pure", "true", on_use_NNUE);
 #else
   o["Use NNUE"]              << Option("true var true var false", "true", on_use_NNUE);