diff --git a/ldm/dream/pngwriter.py b/ldm/dream/pngwriter.py
index c9b49179c6..2461486b22 100644
--- a/ldm/dream/pngwriter.py
+++ b/ldm/dream/pngwriter.py
@@ -70,10 +70,10 @@ class PromptFormatter:
         if opt.upscale:
             switches.append(f'-U {" ".join([str(u) for u in opt.upscale])}')
         if opt.variation_amount > 0:
-            switches.append(f'-v {opt.variation_amount}')
+            switches.append(f'-v{opt.variation_amount}')
         if opt.with_variations:
             formatted_variations = ','.join(f'{seed}:{weight}' for seed, weight in opt.with_variations)
-            switches.append(f'-V {formatted_variations}')
+            switches.append(f'-V{formatted_variations}')
         if t2i.full_precision:
             switches.append('-F')
         return ' '.join(switches)