diff --git a/CMakeLists.txt b/CMakeLists.txt
index 675246f5ee..bd2111e53f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,7 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
 endif (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
+set(CMAKE_OSX_DEPLOYMENT_TARGET 10.9)
 
 # Use GNUInstallDirs to allow customisation
 # but set our own default data dir