diff --git a/branches/cmakemodif/install.cmake b/branches/cmakemodif/install.cmake
index 5b328565b..c5f0236d7 100644
--- a/branches/cmakemodif/install.cmake
+++ b/branches/cmakemodif/install.cmake
@@ -3,7 +3,7 @@
 ######################################################################################
 
 # check cmake version compatibility
-CMAKE_MINIMUM_REQUIRED(VERSION 2.4 FATAL_ERROR)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6 FATAL_ERROR)
 
 # regular expression checking
 INCLUDE_REGULAR_EXPRESSION("^.*$" "^$")