diff --git a/nixview.py b/nixview.py
index 6ecde7e..e1815b2 100755
--- a/nixview.py
+++ b/nixview.py
@@ -10,7 +10,10 @@ def main():
     args = parser.parse_args()
     app = QApplication(sys.argv)
     window = NixView()
-    window.open_file(args.file)
+    window.setMinimumWidth(800)
+    window.setMinimumHeight(600)
+    if len(args.file.strip()) > 0:
+        window.open_file(args.file)
     window.show()
     sys.exit(app.exec_())