diff --git a/core/leras/layers/MsSsim.py b/core/leras/layers/MsSsim.py
index 9aebf8f..6c8e931 100644
--- a/core/leras/layers/MsSsim.py
+++ b/core/leras/layers/MsSsim.py
@@ -1,6 +1,7 @@
 from core.leras import nn
 tf = nn.tf
 
+
 class MsSsim(nn.LayerBase):
     default_power_factors = (0.0448, 0.2856, 0.3001, 0.2363, 0.1333)
 
@@ -20,7 +21,9 @@ class MsSsim(nn.LayerBase):
         y_true_t = tf.transpose(tf.cast(y_true, tf.float32), [0, 2, 3, 1])
         y_pred_t = tf.transpose(tf.cast(y_pred, tf.float32), [0, 2, 3, 1])
 
-        loss = tf.image.ssim_multiscale(y_true_t, y_pred_t, max_val, power_factors=self.power_factors, filter_size=self.kernel_size)
-        return (1.0 - loss) / 2.0
+        ms_ssim_val = tf.image.ssim_multiscale(y_true_t, y_pred_t, max_val, power_factors=self.power_factors, filter_size=self.kernel_size)
+        # ssim_multiscale returns values in range [0, 1] (where 1 is completely identical)
+        # subtract from 1 to get loss
+        return 1 - ms_ssim_val
 
 nn.MsSsim = MsSsim