diff --git a/README.md b/README.md
index 306e92536..98beb677a 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ Please note that the required files from `libgtest-dev` were moved to `googletes
 
 **Note for Ubuntu 14.04 LTS "trusty" users:** you will need to build from source and install GNU Radio manually, as explained below, since GNSS-SDR requires `gnuradio-dev` >= 3.7.3, and Ubuntu 14.04 came with 3.7.2. Install all the packages above BUT EXCEPT `libuhd-dev`, `gnuradio-dev` and `gr-osmosdr` (and remove them if they are already installed in your machine), and install those dependencies using PyBOMBS. The same applies to `libmatio-dev`: Ubuntu 14.04 came with 1.5.2 and the minimum required version is 1.5.3. Please do not install the `libmatio-dev` package and install `libtool`, `automake` and `libhdf5-dev` instead. A recent version of the library will be downloaded and built automatically if CMake does not find it installed.
 
-In Ubuntu versions older than 16.04, `python3-mako` and `python3-six` must be replaced by `python-mako` and `python-six`.
+In distributions older than Ubuntu 16.04 or Debian 9, `python3-mako` and `python3-six` must be replaced by `python-mako` and `python-six`.
 
 **Note for Debian 8 "jessie" users:** please see the note about `libmatio-dev` above. Install `libtool`, `automake` and `libhdf5-dev` instead.