diff --git a/Modules/ThirdParty/Qt/otb-module-init.cmake b/Modules/ThirdParty/Qt/otb-module-init.cmake
index 9a325d7d948a0cc8e1d00aaf63bb0c02612816cd..60ebd9c4977b49ff5c3f7c7e209b3786acf171b5 100644
--- a/Modules/ThirdParty/Qt/otb-module-init.cmake
+++ b/Modules/ThirdParty/Qt/otb-module-init.cmake
@@ -24,3 +24,5 @@ find_package(Qt5Widgets REQUIRED)
 find_package(Qt5OpenGL REQUIRED)
 find_package(Qt5LinguistTools)
 mark_as_advanced( QT_QMAKE_EXECUTABLE )
+
+set(QT_VERSION_STRING ${Qt5Core_VERSION})