diff --git a/CMakeLists.txt b/CMakeLists.txt
index 26ea07a81058b132481cc4b1d235de3737f0bc36..14387a26a02c2c967648b7148c348fc1b850d5fe 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)