diff --git a/ldm/dream/pngwriter.py b/ldm/dream/pngwriter.py
index 8dfc09236a..d4b8fef5f5 100644
--- a/ldm/dream/pngwriter.py
+++ b/ldm/dream/pngwriter.py
@@ -59,6 +59,8 @@ class PromptFormatter:
         switches.append(f'-H{opt.height       or t2i.height}')
         switches.append(f'-C{opt.cfg_scale    or t2i.cfg_scale}')
         switches.append(f'-A{opt.sampler_name or t2i.sampler_name}')
+        if opt.seamless or t2i.seamless:
+            switches.append(f'--seamless')
         if opt.init_img:
             switches.append(f'-I{opt.init_img}')
         if opt.fit: