diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f98530869f338d35d111d9f924152a5b72c03e0..db6adac57c222bbe753a1cb447cf8fb1eccf0eb4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # This is the root OTB CMakeLists file.
 # $Id$
 #
-CMAKE_MINIMUM_REQUIRED(VERSION 2.4)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 IF(COMMAND CMAKE_POLICY)
   CMAKE_POLICY(SET CMP0003 NEW)
 ENDIF(COMMAND CMAKE_POLICY)