diff --git a/core/include/Variable/Variable.h b/core/include/Variable/Variable.h
index ff5f718..dbdab81 100644
--- a/core/include/Variable/Variable.h
+++ b/core/include/Variable/Variable.h
@@ -1,20 +1,24 @@
 #ifndef SCIQLOP_VARIABLE_H
 #define SCIQLOP_VARIABLE_H
 
-#include <QString>
+#include <Common/spimpl.h>
+
+class QString;
 
 /**
- * @brief The Variable struct represents a variable in SciQlop.
+ * @brief The Variable class represents a variable in SciQlop.
  */
-struct Variable {
-    explicit Variable(const QString &name, const QString &unit, const QString &mission)
-            : m_Name{name}, m_Unit{unit}, m_Mission{mission}
-    {
-    }
+class Variable {
+public:
+    explicit Variable(const QString &name, const QString &unit, const QString &mission);
+
+    QString name() const noexcept;
+    QString mission() const noexcept;
+    QString unit() const noexcept;
 
-    QString m_Name;
-    QString m_Unit;
-    QString m_Mission;
+private:
+    class VariablePrivate;
+    spimpl::unique_impl_ptr<VariablePrivate> impl;
 };
 
 #endif // SCIQLOP_VARIABLE_H
diff --git a/core/src/Variable/Variable.cpp b/core/src/Variable/Variable.cpp
new file mode 100644
index 0000000..22d3775
--- /dev/null
+++ b/core/src/Variable/Variable.cpp
@@ -0,0 +1,32 @@
+#include "Variable/Variable.h"
+
+struct Variable::VariablePrivate {
+    explicit VariablePrivate(const QString &name, const QString &unit, const QString &mission)
+            : m_Name{name}, m_Unit{unit}, m_Mission{mission}
+    {
+    }
+
+    QString m_Name;
+    QString m_Unit;
+    QString m_Mission;
+};
+
+Variable::Variable(const QString &name, const QString &unit, const QString &mission)
+        : impl{spimpl::make_unique_impl<VariablePrivate>(name, unit, mission)}
+{
+}
+
+QString Variable::name() const noexcept
+{
+    return impl->m_Name;
+}
+
+QString Variable::mission() const noexcept
+{
+    return impl->m_Mission;
+}
+
+QString Variable::unit() const noexcept
+{
+    return impl->m_Unit;
+}
diff --git a/core/src/Variable/VariableModel.cpp b/core/src/Variable/VariableModel.cpp
index 75389d5..30b5009 100644
--- a/core/src/Variable/VariableModel.cpp
+++ b/core/src/Variable/VariableModel.cpp
@@ -1,6 +1,6 @@
+#include <Variable/Variable.h>
 #include <Variable/VariableModel.h>
 
-#include <Variable/Variable.h>
 
 Q_LOGGING_CATEGORY(LOG_VariableModel, "VariableModel")
 
@@ -67,11 +67,11 @@ QVariant VariableModel::data(const QModelIndex &index, int role) const
         if (auto variable = impl->m_Variables.at(index.row()).get()) {
             switch (index.column()) {
                 case NAME_COLUMN:
-                    return variable->m_Name;
+                    return variable->name();
                 case UNIT_COLUMN:
-                    return variable->m_Unit;
+                    return variable->unit();
                 case MISSION_COLUMN:
-                    return variable->m_Mission;
+                    return variable->mission();
                 default:
                     // No action
                     break;