diff --git a/ldm/generate.py b/ldm/generate.py
index c242826f03..32a6a929a8 100644
--- a/ldm/generate.py
+++ b/ldm/generate.py
@@ -987,7 +987,7 @@ class Generate:
                         if len(upscale) < 2:
                             upscale.append(0.75)
                         image = self.esrgan.process(
-                            image, upscale[1], seed, int(upscale[0]), upscale_denoise_str=upscale_denoise_str)
+                            image, upscale[1], seed, int(upscale[0]), denoise_str=upscale_denoise_str)
                     else:
                         print(">> ESRGAN is disabled. Image not upscaled.")
             except Exception as e: