diff --git a/peekaboo/toolbox/files.py b/peekaboo/toolbox/files.py
index 90503edc..6fe535ee 100644
--- a/peekaboo/toolbox/files.py
+++ b/peekaboo/toolbox/files.py
@@ -36,8 +36,10 @@
 def guess_mime_type_from_file_contents(file_path):
     """  Get type from file magic bytes. """
     mt = magic.from_file(file_path, mime=True)
-    if mt:
-        return mt
+    if not mt:
+        return None
+
+    return mt
 
 
 def guess_mime_type_from_filename(file_path):
@@ -47,5 +49,7 @@ def guess_mime_type_from_filename(file_path):
         mimetypes.add_type('application/javascript', '.jse')
 
     mt = mimetypes.guess_type(file_path)[0]
-    if mt:
-        return mt
+    if not mt:
+        return None
+
+    return mt