diff --git a/CMake/CPackSetup.cmake b/CMake/CPackSetup.cmake
index a71b4e5dbc..01d7c77948 100644
--- a/CMake/CPackSetup.cmake
+++ b/CMake/CPackSetup.cmake
@@ -14,6 +14,7 @@ set(CPACK_PACKAGE_VERSION "${SM_VERSION_TRADITIONAL}")
 set(CPACK_NSIS_HELP_LINK "https://github.com/stepmania/stepmania/issues")
 set(CPACK_NSIS_PACKAGE_NAME "${SM_EXE_NAME} ${NSIS_VERSION_FINAL}")
 set(CPACK_NSIS_URL_INFO_ABOUT "http://www.stepmania.com/")
+set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL ON)
 set(CPACK_RESOURCE_FILE_README "${SM_ROOT_DIR}/README.md")
 set(CPACK_RESOURCE_FILE_LICENSE "${SM_CMAKE_DIR}/license_install.txt")
 set(CPACK_PACKAGE_EXECUTABLES