diff --git a/sources/CMakeLists.txt b/sources/CMakeLists.txt
index 9e8439f..b4e2137 100644
--- a/sources/CMakeLists.txt
+++ b/sources/CMakeLists.txt
@@ -5,7 +5,9 @@ cmake_policy(SET CMP0003 OLD)
 cmake_policy(SET CMP0002 OLD)
 cmake_policy(SET CMP0011 NEW)
 cmake_policy(SET CMP0015 NEW)
-cmake_policy(SET CMP0063 OLD)
+if (POLICY CMP0063)
+    cmake_policy(SET CMP0063 OLD)
+endif()
 
 project(awesomewidgets)
 set(PROJECT_AUTHOR "Evgeniy Alekseev")