diff --git a/cmake/InstallAndPackage.cmake b/cmake/InstallAndPackage.cmake
--- a/cmake/InstallAndPackage.cmake
+++ b/cmake/InstallAndPackage.cmake
@@ -95,7 +95,14 @@ set(CPACK_PACKAGE_HOMEPAGE_URL "https://
 set(CPACK_PACKAGE_CONTACT "OpenTTD <info@openttd.org>")
 set(CPACK_PACKAGE_INSTALL_DIRECTORY "OpenTTD")
 set(CPACK_PACKAGE_CHECKSUM "SHA256")
-set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING.md")
+
+if((APPLE OR WIN32) AND EXISTS ${PANDOC_EXECUTABLE})
+    execute_process(COMMAND ${PANDOC_EXECUTABLE} "${CMAKE_SOURCE_DIR}/COPYING.md" -s -o "${CMAKE_BINARY_DIR}/COPYING.rtf")
+    set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_BINARY_DIR}/COPYING.rtf")
+else()
+    set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING.md")
+endif()
+
 set(CPACK_RESOURCE_FILE_README "${CMAKE_SOURCE_DIR}/README.md")
 set(CPACK_MONOLITHIC_INSTALL YES)
 set(CPACK_PACKAGE_EXECUTABLES "openttd;OpenTTD")