diff --git a/Applications/FileIO/XmlIO/Qt/XmlPrjInterface.h b/Applications/FileIO/XmlIO/Qt/XmlPrjInterface.h
index 41797be49d7fdda2f3b602d22a87c435a0617418..cc3422929b641cf957f8e69c0bebd94ecb350dae 100644
--- a/Applications/FileIO/XmlIO/Qt/XmlPrjInterface.h
+++ b/Applications/FileIO/XmlIO/Qt/XmlPrjInterface.h
@@ -33,7 +33,7 @@ class XmlPrjInterface final : public BaseLib::IO::XMLInterface,
                               public BaseLib::IO::XMLQtInterface
 {
 public:
-    XmlPrjInterface(DataHolderLib::Project& project);
+    explicit XmlPrjInterface(DataHolderLib::Project& project);
 
     ~XmlPrjInterface() override = default;