diff --git a/debian/control b/debian/control
index 6b70209c1..1d885658c 100644
--- a/debian/control
+++ b/debian/control
@@ -16,6 +16,7 @@ Build-Depends: debhelper-compat (= 12),
                librhash-dev,
                libuv1-dev (>= 1.10),
                procps [!hurd-any],
+               python3-sphinx,
                python3-sphinxcontrib.qthelp | python3-sphinx (<< 2.0),
                qtbase5-dev <!stage1>,
                zlib1g-dev