diff --git a/CMakeLists.txt b/CMakeLists.txt
index 245e6a8..a47fc77 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,10 @@ if (POLICY CMP0060)
   # link libraries by full path
   cmake_policy(SET CMP0060 NEW)
 endif()
+if (POLICY CMP0074)
+  # use environment variables to find libraries
+  cmake_policy(SET CMP0074 NEW)
+endif()
 
 include(PreventInSourceBuild)
 prevent_in_source_build()