diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca7f6c0..8bdc4ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,13 +11,13 @@ project(wgrib2 VERSION ${pVersion} LANGUAGES C)
 
 # Handle user build options.
 option(ENABLE_DOCS "Enable generation of doxygen-based documentation." OFF)
-option(USE_NETCDF "Use NetCDF" on)
+option(USE_NETCDF "Use NetCDF" off)
 option(USE_REGEX "Use Regex?" on)
 option(USE_TIGGE "Use tigge?" on)
 option(USE_MYSQL "Use MySQL?" off)
 option(USE_IPOLATES "Use Ipolates" off)
 option(USE_UDF "Use UDF?" off)
-option(USE_OPENMP "Use OpenMP?" on)
+option(USE_OPENMP "Use OpenMP?" off)
 option(USE_PROJ4 "Use Proj4?" off)
 option(USE_WMO_VALIDATION "Use WMO Validation?" off)
 option(DISABLE_TIMEZONE "Disable posix Timezone?" off)