diff --git a/doc/wiki/Installation-related/Installation:-Option-List.md b/doc/wiki/Installation-related/Installation:-Option-List.md
index ddd7109f0..776a725a5 100644
--- a/doc/wiki/Installation-related/Installation:-Option-List.md
+++ b/doc/wiki/Installation-related/Installation:-Option-List.md
@@ -135,7 +135,7 @@ disabled). See the "Restriction" of each option carefully.
 | `--hdf5`                    | `true`, `false`            | `false`       | Enable HDF5 output (see [[Outputs]]) | May need to set `HDF5_PATH` in [[configuration file \| Installation:-Machine-Configuration-File#1-Library-paths]] | <a name="--hdf5"></a> `SUPPORT_HDF5` |
 | `--gsl`                     | `true`, `false`            | `false`       | Enable GNU scientific library | May need to set `GSL_PATH` in [[configuration file \| Installation:-Machine-Configuration-File#1-Library-paths]] | <a name="--gsl"></a> `SUPPORT_GSL` |
 | `--fftw`                    | `OFF`, `FFTW2`, `FFTW3`    | `OFF`         | Enable FFTW | May need to set `FFTW2/3_PATH` in [[configuration file \| Installation:-Machine-Configuration-File#1-Library-paths]] | <a name="--fftw"></a> `SUPPORT_FFTW` |
-| `--spectral_interpolation`  | `true`, `false`            | `false`       | Enable spectral interpolation | Must enable `--gsl` and set `--fftw` | <a name="--spectral_interpolation"></a> `SUPPORT_SPECTRAL_INT` |
+| `--spectral_interpolation`  | `true`, `false`            | `false`       | Enable spectral interpolation. If true, the default fluid interpolation scheme will be changed to spectral interpolation. | Must enable `--gsl` and set `--fftw` | <a name="--spectral_interpolation"></a> `SUPPORT_SPECTRAL_INT` |
 | `--rng`                     | `RNG_GNU_EXT`, `RNG_CPP11` | `RNG_GNU_EXT` | Random number generators. `RNG_GNU_EXT`: GNU extension `drand48_r`; `RNG_CPP11`: c++11 `<random>` | Use `RNG_GNU_EXT` for compilers supporting GNU extensions (<b>they may not be supported on macOS</b>); use `RNG_CPP11` for compilers supporting c++11 (<b>one may need to add `-std=c++11` to `CXXFLAG`</b> &#8594; see [[compilation flags \| Installation:-Machine-Configuration-File#3-Compilation-flags]]) | <a name="--rng"></a> `RANDOM_NUMBER` |
 > [!CAUTION]
 > On macOS, we recommend using the GNU compiler and set `--rng=RNG_CPP11`.
diff --git a/src/Init/Init_ResetParameter.cpp b/src/Init/Init_ResetParameter.cpp
index 4ecd59889..e0ffeafae 100644
--- a/src/Init/Init_ResetParameter.cpp
+++ b/src/Init/Init_ResetParameter.cpp
@@ -388,14 +388,22 @@ void Init_ResetParameter()
 #  elif ( MODEL == ELBDM )
    if ( OPT__FLU_INT_SCHEME == INT_DEFAULT )
    {
+#     ifdef SUPPORT_SPECTRAL_INT
+      OPT__FLU_INT_SCHEME = INT_SPECTRAL;
+#     else
       OPT__FLU_INT_SCHEME = INT_CQUAR;
+#     endif
 
       PRINT_RESET_PARA( OPT__FLU_INT_SCHEME, FORMAT_INT, "" );
    }
 
    if ( OPT__REF_FLU_INT_SCHEME == INT_DEFAULT )
    {
+#     ifdef SUPPORT_SPECTRAL_INT
+      OPT__REF_FLU_INT_SCHEME = INT_SPECTRAL;
+#     else
       OPT__REF_FLU_INT_SCHEME = INT_CQUAR;
+#     endif
 
       PRINT_RESET_PARA( OPT__REF_FLU_INT_SCHEME, FORMAT_INT, "" );
    }