diff --git a/CMakeLists.txt b/CMakeLists.txt
index 827e07c..6aa9ca3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,10 @@ include(GNUInstallDirs)
 
 set(CPACK_PROJECT_NAME ${PROJECT_NAME})
 set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
-include(CPack)
+
+if(NOT CPack_CMake_INCLUDED)
+  include(CPack)
+endif()
 
 # Target Start
 add_library(${PROJECT_NAME}