diff --git a/debian/changelog b/debian/changelog
index a6f34992..6ab9a78c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+gromacs (2020.4-3) UNRELEASED; urgency=medium
+
+  * Add missing build dependency on dh addon.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Sat, 14 Nov 2020 23:37:55 -0000
+
 gromacs (2020.4-2) unstable; urgency=medium
 
   * debian/patches/disable-listed-forces-test.patch: Do exactly what the
diff --git a/debian/control b/debian/control
index 510a0807..f0fd1dbc 100644
--- a/debian/control
+++ b/debian/control
@@ -16,7 +16,8 @@ Build-Depends: chrpath,
                lsb-release,
                mpich,
                openmpi-bin,
-               zlib1g-dev
+               zlib1g-dev,
+               dh-strip-nondeterminism
 Build-Depends-Indep: doxygen,
                      ghostscript,
                      graphviz,