diff --git a/build_vol_cmake.sh b/build_vol_cmake.sh
index 26c989ed..3e7b359a 100755
--- a/build_vol_cmake.sh
+++ b/build_vol_cmake.sh
@@ -124,7 +124,7 @@ while getopts "$optspec" optchar; do
         echo "Using the static YAJL library."
         echo
         ;;
-    c)  CMAKE_C_FLAGS="/DCURL_STATICLIB"
+    u)  CURL_LIB_OPT="-DCURL_STATICLIB"
         echo "Using the static cURL library."
         echo
         ;;
@@ -195,7 +195,7 @@ rm -f "${BUILD_DIR}/CMakeCache.txt"
 
 cd "${BUILD_DIR}"
 
-CFLAGS="-D_POSIX_C_SOURCE=200809L" cmake -G "${CMAKE_GENERATOR}" "-DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}" "-DHDF5_ROOT=${HDF5_INSTALL_DIR}" -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" "${CURL_OPT}" "${YAJL_OPT}" "${YAJL_LIB_OPT}" "${CONNECTOR_DEBUG_OPT}" "${CURL_DEBUG_OPT}" "${MEM_TRACK_OPT}" "${THREAD_SAFE_OPT}" "${SCRIPT_DIR}"
+CFLAGS="-D_POSIX_C_SOURCE=200809L" cmake -G "${CMAKE_GENERATOR}" "-DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}" "-DHDF5_ROOT=${HDF5_INSTALL_DIR}" -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}" "${CURL_OPT}" "${CURL_LIB_OPT}" "${YAJL_OPT}" "${YAJL_LIB_OPT}" "${CONNECTOR_DEBUG_OPT}" "${CURL_DEBUG_OPT}" "${MEM_TRACK_OPT}" "${THREAD_SAFE_OPT}" "${SCRIPT_DIR}"
 
 echo "Build files have been generated for CMake generator '${CMAKE_GENERATOR}'"