diff --git a/lib/pairwise_transform_utils.lua b/lib/pairwise_transform_utils.lua
index 684ba52..57508b1 100644
--- a/lib/pairwise_transform_utils.lua
+++ b/lib/pairwise_transform_utils.lua
@@ -56,8 +56,8 @@ function pairwise_transform_utils.preprocess(src, crop_size, options)
       dest = pairwise_transform_utils.crop_if_large(dest, math.max(crop_size * 2, options.max_size))
       dest = data_augmentation.blur(dest, options.random_blur_rate,
 				    options.random_blur_size, 
-				    options.random_blur_min,
-				    options.random_blur_max)
+				    options.random_blur_sigma_min,
+				    options.random_blur_sigma_max)
       dest = data_augmentation.color_noise(dest, options.random_color_noise_rate)
       dest = data_augmentation.overlay(dest, options.random_overlay_rate)
       dest = data_augmentation.unsharp_mask(dest, options.random_unsharp_mask_rate)