diff --git a/src/calibre/gui2/viewer/main.py b/src/calibre/gui2/viewer/main.py
index a1d3b9bea4..f0f29a67e6 100644
--- a/src/calibre/gui2/viewer/main.py
+++ b/src/calibre/gui2/viewer/main.py
@@ -731,8 +731,8 @@ def main(args=sys.argv):
             main.raise_()
     if opts.full_screen:
         main.action_full_screen.trigger()
-        with main:
-            return app.exec_()
+    with main:
+        return app.exec_()
     return 0
 
 if __name__ == '__main__':