diff --git a/SConstruct b/SConstruct
index 7d07513e46..d77c92a29b 100644
--- a/SConstruct
+++ b/SConstruct
@@ -702,9 +702,11 @@ Export('env install_prefix final_prefix config_prefix final_config_prefix librar
 conf = env.Configure ()
 
 if conf.CheckCHeader('/System/Library/Frameworks/CoreAudio.framework/Versions/A/Headers/CoreAudio.h'):
-    subst_dict['%JACK_BACKEND%'] = "coreaudio:Built-in Audio:in"
+    subst_dict['%JACK_INPUT%'] = "coreaudio:Built-in Audio:in"
+    subst_dict['%JACK_OUTPUT%'] = "coreaudio:Built-in Audio:out"
 else:
-    subst_dict['%JACK_BACKEND%'] = "alsa_pcm:playback_"
+    subst_dict['%JACK_INPUT%'] = "alsa_pcm:playback_"
+    subst_dict['%JACK_OUTPUT%'] = "alsa_pcm:capture_"
 
 # posix_memalign available
 if not conf.CheckFunc('posix_memalign'):
diff --git a/ardour.rc.in b/ardour.rc.in
index 685bf22d86..2e741abb23 100644
--- a/ardour.rc.in
+++ b/ardour.rc.in
@@ -22,8 +22,8 @@
     <Option name="auto-xfade" value="yes"/>
     <Option name="no-new-session-dialog" value="yes"/>
     <Option name="timecode-source-is-synced" value="yes"/>
-    <Option name="auditioner-left-out" value="%JACK_BACKEND%1"/>
-    <Option name="auditioner-right-out" value="%JACK_BACKEND%2"/>
+    <Option name="auditioner-left-out" value="%JACK_INPUT%1"/>
+    <Option name="auditioner-right-out" value="%JACK_INPUT%2"/>
     <Option name="quieten-at-speed" value="1.000000"/>
     <Option name="use-vst" value="yes"/>
   </Config>