diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58d164a..736eb20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
 
-if (NOT DEFINED QT_VERSION_MAJOR)
+if (NOT QT_VERSION_MAJOR)
     find_package(QT NAMES Qt6 Qt5 COMPONENTS Core REQUIRED)
 endif()