diff --git a/po/template.pot b/po/template.pot
index d23ed267..7e5bd21d 100644
--- a/po/template.pot
+++ b/po/template.pot
@@ -5,7 +5,7 @@
 #, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: Pure Data 0.49.0\n"
+"Project-Id-Version: Pure Data 0.50.0\n"
 "Report-Msgid-Bugs-To: pd-dev@iem.at\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
diff --git a/src/g_canvas.c b/src/g_canvas.c
index cd9098e9..76a2259a 100644
--- a/src/g_canvas.c
+++ b/src/g_canvas.c
@@ -1659,6 +1659,21 @@ static void canvas_stdlib(t_canvasenvironment *e, const char *stdlib)
     }
 }
 
+static void canvas_jackname(t_canvasenvironment *e, const char *jackname)
+{
+    t_namelist *nl;
+    char strbuf[MAXPDSTRING];
+
+#ifdef USEAPI_JACK
+    sys_close_audio();
+    sys_set_audio_api(API_JACK), jack_client_name(jackname);
+    sys_reopen_audio();
+#else
+   fprintf(stderr, "Pd compiled without JACK-support, ignoring '%s' flag\n", *argv);
+#endif
+    return;
+}
+
 
 void canvas_declare(t_canvas *x, t_symbol *s, int argc, t_atom *argv)
 {
@@ -1692,6 +1707,11 @@ void canvas_declare(t_canvas *x, t_symbol *s, int argc, t_atom *argv)
             canvas_stdlib(e, atom_getsymbolarg(i+1, argc, argv)->s_name);
             i++;
         }
+        else if ((argc > i+1) && !strcmp(flag, "-jackname"))
+        {
+            canvas_jackname(e, atom_getsymbolarg(i+1, argc, argv)->s_name);
+            i++;
+        }
         else post("declare: %s: unknown declaration", flag);
     }
 }