diff --git a/src/modules/jack/module-jack-sink.c b/src/modules/jack/module-jack-sink.c
index fc976fa72..9f3e071fd 100644
--- a/src/modules/jack/module-jack-sink.c
+++ b/src/modules/jack/module-jack-sink.c
@@ -334,7 +334,7 @@ int pa__init(pa_module*m) {
         goto fail;
     }
 
-    ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsInput);
+    ports = jack_get_ports(u->client, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsInput);
 
     channels = 0;
     for (p = ports; *p; p++)
diff --git a/src/modules/jack/module-jack-source.c b/src/modules/jack/module-jack-source.c
index a898e0e5a..6c68527b6 100644
--- a/src/modules/jack/module-jack-source.c
+++ b/src/modules/jack/module-jack-source.c
@@ -286,7 +286,7 @@ int pa__init(pa_module*m) {
         goto fail;
     }
 
-    ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsOutput);
+    ports = jack_get_ports(u->client, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsOutput);
 
     channels = 0;
     for (p = ports; *p; p++)