diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2bac23aad..37d7b9766 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -167,8 +167,6 @@ option(ENABLE_YASIM      "Set to ON to build FlightGear with YASIM FDM (default)
 option(ENABLE_JSBSIM     "Set to ON to build FlightGear with JSBSim FDM (default)" ON)
 option(EVENT_INPUT       "Set to ON to build FlightGear with event-based Input support" ${EVENT_INPUT_DEFAULT})
 option(ENABLE_RTI        "Set to ON to build FlightGear with RTI support" OFF)
-option(ENABLE_GDAL       "Set to ON to build FlightGear with GDAL support" OFF)
-option(ENABLE_OPENMP     "Set to ON to build FlightGear with OpenMP compiler support" OFF)
 option(ENABLE_PROFILE    "Set to ON to build FlightGear with gperftools profiling support" OFF)
 option(SYSTEM_SQLITE     "Set to ON to build FlightGear with the system's SQLite3 library" OFF)
 option(ENABLE_IAX        "Set to ON to build FlightGear with IAXClient/fgcom built-in (default)" ON)