diff --git a/README.md b/README.md
index 957e25672f8f6387684905bf498349c27fae2643..fa16a2c111a8dd95ae550ad20bcc784d43ac006d 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,7 @@ Optional dependencies:
     interferometry responses)
 - [mpi4py](https://mpi4py.scipy.org) (for MPI-parallel execution)
 - [matplotlib](https://matplotlib.org/) (for field plotting)
+- [pypocketfft](https://gitlab.mpcdf.mpg.de/mtr/pypocketfft) (for faster FFTs)
 
 ### Sources
 
@@ -89,6 +90,14 @@ MPI support is added via:
 
     sudo apt-get install python3-mpi4py
 
+Pypocketfft is added via:
+    pip3 install --user git+https://gitlab.mpcdf.mpg.de/mtr/pypocketfft
+
+If this library is present, NIFTy will detect it automatically and prefer
+it over SciPy's FFT. The underlying code is actually the same, but
+pypocketfft is compiled with optimizations for the host CPU and can provide
+significantly faster transforms.
+
 ### Running the tests
 
 To run the tests, additional packages are required:
diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index 1836ffb0829ee67eeb98a61b0c2e51092b98ccec..0313bd7a669bbcbc8bdb073593de5c2a59894633 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -26,6 +26,14 @@ MPI support is added via::
 
     sudo apt-get install python3-mpi4py
 
+Pypocketfft is added via:
+    pip3 install --user git+https://gitlab.mpcdf.mpg.de/mtr/pypocketfft
+
+If this library is present, NIFTy will detect it automatically and prefer
+it over SciPy's FFT. The underlying code is actually the same, but
+pypocketfft is compiled with optimizations for the host CPU and can provide
+significantly faster transforms.
+
 NIFTy documentation is provided by Sphinx. To build the documentation::
 
     sudo apt-get install python3-sphinx-rtd-theme dvipng