diff --git a/modules/util/util.py b/modules/util/util.py
index 0143f4a57c9fbad29b6bfb493a417a16f50d5425..44a034e22ec15a47b2d23b316e65655f24c57945 100644
--- a/modules/util/util.py
+++ b/modules/util/util.py
@@ -435,13 +435,14 @@ def make_histogram(values, edges):
     return h
 
 
-def normalize(data, param, mean_std_dict, add_noise=False, noise_scale=0.01, seed=None, copy=True):
-    if copy:
-        data = data.copy()
+def normalize(data, param, mean_std_dict, copy=True):
 
     if mean_std_dict.get(param) is None:
         return data
 
+    if copy:
+        data = data.copy()
+
     shape = data.shape
     data = data.flatten()
 
@@ -449,12 +450,6 @@ def normalize(data, param, mean_std_dict, add_noise=False, noise_scale=0.01, see
     data -= mean
     data /= std
 
-    if add_noise:
-        if seed is not None:
-            np.random.seed(seed)
-        rnd = np.random.normal(loc=0, scale=noise_scale, size=data.size)
-        data += rnd
-
     not_valid = np.isnan(data)
     data[not_valid] = 0
 
@@ -463,6 +458,23 @@ def normalize(data, param, mean_std_dict, add_noise=False, noise_scale=0.01, see
     return data
 
 
+def add_noise(data, noise_scale=0.01, seed=None, copy=True):
+    if copy:
+        data = data.copy()
+
+    shape = data.shape
+    data = data.flatten()
+
+    if seed is not None:
+        np.random.seed(seed)
+    rnd = np.random.normal(loc=0, scale=noise_scale, size=data.size)
+    data += rnd
+
+    data = np.reshape(data, shape)
+
+    return data
+
+
 def denormalize(data, param, mean_std_dict, copy=True):
     if copy:
         data = data.copy()