diff --git a/image_classifier/image_classifier.py b/image_classifier/image_classifier.py
index 1aadda9..e6ce176 100755
--- a/image_classifier/image_classifier.py
+++ b/image_classifier/image_classifier.py
@@ -130,7 +130,8 @@ class image_classifier:
             for known_person in self.known_people:
                 for encoding in encodings:
                     if face_recognition.compare_faces([known_person['encoding']], encoding)[0]:
-                        people.append(known_person['name'])
+                        if known_person['name'] not in people:
+                            people.append(known_person['name'])
         except PIL.UnidentifiedImageError as error:
             self._log.debug(f"File '{file}' don't seem to be an image.")
             return False