diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4edfffda0..6f8f87623 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 2.8.8)
+cmake_minimum_required(VERSION 2.8.11)
+# we depend on 2.8.11 introducing target_include_directories
 
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR AND NOT MSVC_IDE)
   message(FATAL_ERROR "In-source builds are not allowed.