diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 08ab7729b..f4f6928ae 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -31,6 +31,11 @@ IF(COMMAND cmake_policy)
   # Works around warnings about escaped quotes in ADD_DEFINITIONS
   # statements
   cmake_policy(SET CMP0005 OLD)
+
+  # allow to link to qtmain automatically under Windows
+  IF(POLICY CMP0020)
+    CMAKE_POLICY(SET CMP0020 NEW)
+  ENDIF()
 ENDIF(COMMAND cmake_policy)
 
 INCLUDE(nel)
diff --git a/code/nel/tools/3d/panoply_preview/CMakeLists.txt b/code/nel/tools/3d/panoply_preview/CMakeLists.txt
index 6d1cbd354..4f96eeea3 100644
--- a/code/nel/tools/3d/panoply_preview/CMakeLists.txt
+++ b/code/nel/tools/3d/panoply_preview/CMakeLists.txt
@@ -15,7 +15,6 @@ SET(CMAKE_AUTOMOC ON)
 
 QT5_ADD_RESOURCES(RESOURCE_ADDED ${RESOURCES})
 
-CMAKE_POLICY(SET CMP0020 NEW)
 ADD_EXECUTABLE(nl_panoply_preview WIN32 ${SRC}
 	${SRCS}
 	${HDRS}
diff --git a/code/nel/tools/3d/shared_widgets/CMakeLists.txt b/code/nel/tools/3d/shared_widgets/CMakeLists.txt
index 153995dd2..4208988ec 100644
--- a/code/nel/tools/3d/shared_widgets/CMakeLists.txt
+++ b/code/nel/tools/3d/shared_widgets/CMakeLists.txt
@@ -11,7 +11,6 @@ SET(CMAKE_AUTOMOC ON)
 
 QT5_ADD_RESOURCES(RESOURCE_ADDED ${RESOURCES})
 
-CMAKE_POLICY(SET CMP0020 NEW)
 NL_TARGET_LIB(shared_widgets ${SRCS} ${HDRS} ${RSRC} ${RESOURCE_ADDED})
 
 TARGET_LINK_LIBRARIES(shared_widgets nelmisc nel3d Qt5::Widgets)