diff --git a/CMakeLists.txt b/CMakeLists.txt
index c48435e0f4..960dc043b9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -928,7 +928,7 @@ include(cmake/dependencies.cmake)
 set(STATUS_PARALLEL "OFF")
 set(IMPORT_MPI "")
 option(NETCDF_ENABLE_PARALLEL4 "Build netCDF-4 with parallel IO" "${HDF5_PARALLEL}")
-option(NETCDF_MPIEXEC "Command to use to launch parallel I/O tests" OFF)
+option(NETCDF_MPIEXEC "Command to use instead of mpiexec to launch parallel I/O tests" OFF)
 if(NETCDF_ENABLE_PARALLEL4 AND NETCDF_ENABLE_HDF5)
   if(NOT HDF5_PARALLEL)
     set(USE_PARALLEL OFF CACHE BOOL "")