diff --git a/debian/control b/debian/control
index f7a4af0..7af71f7 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Maintainer: Jakob Ketterl <jakob.ketterl@gmx.de>
 Section: hamradio
 Priority: optional
 Standards-Version: 4.2.0
-Build-Depends: debhelper (>= 10), dh-python, python3 (>= 3.5)
+Build-Depends: debhelper (>= 11), dh-python, python3-all (>= 3.5), python3-setuptools
 Homepage: https://www.openwebrx.de/
 Vcs-Browser: https://github.com/jketterl/openwebrx
 Vcs-Git: https://github.com/jketterl/openwebrx.git
diff --git a/owrx/source/hackrf.py b/owrx/source/hackrf.py
index 0f3855b..23ffcc8 100644
--- a/owrx/source/hackrf.py
+++ b/owrx/source/hackrf.py
@@ -11,6 +11,7 @@ class HackrfSource(DirectSource):
                 "rf_gain": Option("-g"),
                 "lna_gain": Option("-l"),
                 "rf_amp": Option("-a"),
+                "ppm": Option("-C"),
             }
         ).setStatic("-r-")