diff --git a/utf8cppConfig.cmake.in b/utf8cppConfig.cmake.in
index 450fe8d..fd3480b 100644
--- a/utf8cppConfig.cmake.in
+++ b/utf8cppConfig.cmake.in
@@ -3,4 +3,6 @@
 include("${CMAKE_CURRENT_LIST_DIR}/utf8cppTargets.cmake")
 check_required_components( "utf8cpp" )
 
-add_library(utf8::cpp ALIAS utf8cpp)
+if(NOT TARGET utf8::cpp)
+    add_library(utf8::cpp ALIAS utf8cpp)
+endif()