diff --git a/src/ui/HelperWidgets/TopicComboBoxWidget.cpp b/src/ui/HelperWidgets/TopicComboBoxWidget.cpp
index 07502eb..d35eb0f 100644
--- a/src/ui/HelperWidgets/TopicComboBoxWidget.cpp
+++ b/src/ui/HelperWidgets/TopicComboBoxWidget.cpp
@@ -70,4 +70,5 @@ TopicComboBoxWidget::findSourceButtonPressed()
         Utils::UI::createCriticalMessageBox("Topic not found!", "The bag file does not contain any corresponding topics!");
         return;
     }
+    enableOkButton(!m_parameters.sourceDirectory.isEmpty() && !m_parameters.topicName.isEmpty() && !m_parameters.targetDirectory.isEmpty());
 }