diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2439806..1317c483 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,10 @@
 
 cmake_minimum_required(VERSION 2.6)
 
+if(POLICY CMP0020)
+    cmake_policy(SET CMP0020 OLD)
+endif()
+
 if(POLICY CMP0043)
     cmake_policy(SET CMP0043 OLD)
 endif()