diff --git a/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.cpp b/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.cpp
index e9249e757b7b824b1f9ddcff48e5c8f9f9f32894..985f914d16d8c501992aeab2b44a0c7a00d9b8e6 100644
--- a/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.cpp
+++ b/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.cpp
@@ -163,17 +163,4 @@ namespace armarx::aron::data::reader
         i = input;
     }
 
-    bool
-    NlohmannJSONReaderWithoutTypeCheck::readNull(InputType& input)
-    {
-        try
-        {
-            const std::string e = input;
-            return e == "nullopt";
-        }
-        catch (...)
-        {
-            return false;
-        }
-    }
 } // namespace armarx::aron::data::reader
diff --git a/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.h b/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.h
index f109fa279ce83e1285ee8328be9a98ad5f8ce197..2d17af7f5ead72cc51f04623a816e1fb8236c8ad 100644
--- a/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.h
+++ b/source/RobotAPI/libraries/aron/core/data/rw/reader/nlohmannJSON/NlohmannJSONReaderWithoutTypeCheck.h
@@ -70,6 +70,5 @@ namespace armarx::aron::data::reader
         void readString(InputType& input, std::string& i, Path& p) override;
         void readBool(InputType& input, bool& i, Path& p) override;
 
-        bool readNull(InputType& input) override;
     };
 } // namespace armarx::aron::data::reader