diff --git a/src/learn/learn.cpp b/src/learn/learn.cpp
index c03e425c..90e6cb0f 100644
--- a/src/learn/learn.cpp
+++ b/src/learn/learn.cpp
@@ -951,7 +951,7 @@ namespace Learner
     }
 
     // Learning from the generated game record
-    void learn(Position&, istringstream& is)
+    void learn(istringstream& is)
     {
         LearnerThink::Params params;
 
diff --git a/src/learn/learn.h b/src/learn/learn.h
index 5efeb516..008ca7af 100644
--- a/src/learn/learn.h
+++ b/src/learn/learn.h
@@ -67,7 +67,7 @@ namespace Learner
     double calc_grad(Value shallow, const PackedSfenValue& psv);
 
     // Learning from the generated game record
-    void learn(Position& pos, std::istringstream& is);
+    void learn(std::istringstream& is);
 }
 
 #endif // ifndef _LEARN_H_
diff --git a/src/uci.cpp b/src/uci.cpp
index dbef05bf..e6b45c02 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -339,7 +339,7 @@ void UCI::loop(int argc, char* argv[]) {
       else if (token == "compiler") sync_cout << compiler_info() << sync_endl;
 
       else if (token == "gensfen") Learner::gensfen(is);
-      else if (token == "learn") Learner::learn(pos, is);
+      else if (token == "learn") Learner::learn(is);
       else if (token == "convert") Learner::convert(is);
       else if (token == "convert_bin") Learner::convert_bin(is);
       else if (token == "convert_plain") Learner::convert_plain(is);