diff --git a/src/UI/UI_item.cpp b/src/UI/UI_item.cpp
index c209fbf..ce0d5f1 100644
--- a/src/UI/UI_item.cpp
+++ b/src/UI/UI_item.cpp
@@ -137,4 +137,15 @@ json UI_item::to_json() const
     j["enabled"] = enabled;
     j["visible"] = visible;
     return j;
-}
\ No newline at end of file
+}
+
+void UI_item::click() const {};
+
+void UI_item::set_selected(std::string selected)
+{
+    UNUSED(selected);
+};
+void UI_item::set_value(double value)
+{
+    UNUSED(value);
+};
\ No newline at end of file
diff --git a/src/UI/UI_item.hpp b/src/UI/UI_item.hpp
index 6695cda..6505063 100644
--- a/src/UI/UI_item.hpp
+++ b/src/UI/UI_item.hpp
@@ -42,15 +42,9 @@ class UI_item
 
     virtual json to_json() const;
 
-    virtual void click() const {};
-    virtual void set_selected(std::string selected)
-    {
-        UNUSED(selected);
-    };
-    virtual void set_value(double value)
-    {
-        UNUSED(value);
-    };
+    virtual void click() const;
+    virtual void set_selected(std::string selected);
+    virtual void set_value(double value);
 
   protected:
     std::string m_id;