diff --git a/aidge_export_cpp/export_utils.py b/aidge_export_cpp/export_utils.py
index 7830800803c357150f84444e508a5e261c798166..4cbc38d7d43d56893dd093455310f891226023d6 100644
--- a/aidge_export_cpp/export_utils.py
+++ b/aidge_export_cpp/export_utils.py
@@ -215,6 +215,8 @@ def normalize(array):
     """
     Normalize an input image between -1 and 1
     """
+    if array.max() == array.min():
+        return array/array.max()
     array = (array - array.min()) / (array.max() - array.min())
     return 2 * array - 1