diff --git a/CMakeLists.txt b/CMakeLists.txt
index 52b5ae99..a6554d69 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@
 # LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 # OF THIS SOFTWARE.
 
-cmake_minimum_required(VERSION 2.8.9)
+cmake_minimum_required(VERSION 2.8.11) # b/c of use of BUILD_INTERFACE generator expression
 
 # Default policy is from 2.8.9
 cmake_policy(VERSION 2.8.9)