diff --git a/Plugins/Libigl/stkLibiglCopyleft/CMakeLists.txt b/Plugins/Libigl/stkLibiglCopyleft/CMakeLists.txt
index 20971d4..bab888b 100644
--- a/Plugins/Libigl/stkLibiglCopyleft/CMakeLists.txt
+++ b/Plugins/Libigl/stkLibiglCopyleft/CMakeLists.txt
@@ -20,7 +20,9 @@ if(CGAL_FOUND)
          ON)
    
   if(CGAL_ACTIVATE_CONCURRENCY)
-    find_package(TBB REQUIRED)
+    if (NOT TARGET TBB)
+      find_package(TBB REQUIRED)
+    endif ()
     if(TBB_FOUND)
       add_definitions( -DNOMINMAX -DCGAL_LINKED_WITH_TBB )
     endif(TBB_FOUND)