diff --git a/src/application.py b/src/application.py
index 901412887..d18a1d824 100644
--- a/src/application.py
+++ b/src/application.py
@@ -37,6 +37,8 @@ except ImportError:
 logging_helpers.init(sys.stderr.isatty())
 log = logging.getLogger('gajim.gajim')
 
+MIN_NBXMPP_VER = "0.5.3"
+
 
 class GajimApplication(Gtk.Application):
     '''Main class handling activation and command line.'''
@@ -85,6 +87,18 @@ class GajimApplication(Gtk.Application):
         import gtkexcepthook
         gtkexcepthook.init()
 
+        try:
+            import nbxmpp
+        except ImportError:
+            print('Gajim needs python-nbxmpp to run. Quitting…')
+            sys.exit(1)
+
+        from distutils.version import LooseVersion as V
+        if V(nbxmpp.__version__) < V(MIN_NBXMPP_VER):
+            print('Gajim needs python-nbxmpp >= %s to run. '
+                  'Quitting…' % MIN_NBXMPP_VER)
+            sys.exit(1)
+
         # Create and initialize Application Paths & Databases
         import common.configpaths
         common.configpaths.gajimpaths.init(
diff --git a/src/gajim.py b/src/gajim.py
index f1c0aa324..94e071765 100644
--- a/src/gajim.py
+++ b/src/gajim.py
@@ -47,19 +47,6 @@ gi.require_version('Gdk', '3.0')
 gi.require_version('GObject', '2.0')
 gi.require_version('Pango', '1.0')
 
-MIN_NBXMPP_VER = "0.5.3"
-
-try:
-    import nbxmpp
-except ImportError:
-    print('Gajim needs python-nbxmpp to run. Quiting…')
-    sys.exit(1)
-
-from distutils.version import LooseVersion as V
-if V(nbxmpp.__version__) < V(MIN_NBXMPP_VER):
-    print('Gajim needs python-nbxmpp >= %s to run. Quiting…' % MIN_NBXMPP_VER)
-    sys.exit(1)
-
 from application import GajimApplication
 
 app = GajimApplication()