diff --git a/gui/include/SqpApplication.h b/gui/include/SqpApplication.h
index 8b37273..2de21cd 100644
--- a/gui/include/SqpApplication.h
+++ b/gui/include/SqpApplication.h
@@ -10,6 +10,8 @@
 
 Q_DECLARE_LOGGING_CATEGORY(LOG_SqpApplication)
 
+class DataSourceController;
+
 /**
  * @brief The SqpApplication class aims to make the link between SciQlop
  * and its plugins. This is the intermediate class that SciQlop has to use
@@ -26,6 +28,8 @@ public:
     virtual ~SqpApplication();
     void initialize();
 
+    DataSourceController &dataSourceController() const noexcept;
+
 private:
     class SqpApplicationPrivate;
     spimpl::unique_impl_ptr<SqpApplicationPrivate> impl;
diff --git a/gui/src/SqpApplication.cpp b/gui/src/SqpApplication.cpp
index 6c6f28d..bd378d0 100644
--- a/gui/src/SqpApplication.cpp
+++ b/gui/src/SqpApplication.cpp
@@ -44,3 +44,8 @@ SqpApplication::~SqpApplication()
 void SqpApplication::initialize()
 {
 }
+
+DataSourceController &SqpApplication::dataSourceController() const noexcept
+{
+    return *impl->m_DataSourceController;
+}