diff --git a/CMakeLists.txt b/CMakeLists.txt
index c790d0b..e6d18ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -219,7 +219,7 @@ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/sdbus-c++.pc
 set(CPACK_PACKAGE_VENDOR "Kistler")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "high-level C++ D-Bus library")
 set(CPACK_PACKAGE_CONTACT "info@kistler.com")
-set(CPACK_RESOURCE_FILE_README "${CMAKE_SOURCE_DIR}/README.md")
+set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
 set(CPACK_COMPONENTS_ALL runtime dev doc)
 set(CPACK_COMPONENT_DEV_DEPENDS "runtime")