diff --git a/tools/binpac/CMakeLists.txt b/tools/binpac/CMakeLists.txt
index d969ddc49e..6f1e549207 100644
--- a/tools/binpac/CMakeLists.txt
+++ b/tools/binpac/CMakeLists.txt
@@ -3,7 +3,7 @@ project(BinPAC)
 ########################################################################
 ## CMake Configuration
 
-cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 2.6 FATAL_ERROR)
 
 # Prohibit in-source builds.
 if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")