diff --git a/piexif/_load.py b/piexif/_load.py
index e815850..0df353e 100644
--- a/piexif/_load.py
+++ b/piexif/_load.py
@@ -164,6 +164,8 @@ def convert_value(self, val):
             if length > 4:
                 pointer = struct.unpack(self.endian_mark + "L", value)[0]
                 data = self.tiftag[pointer : pointer + length - 1]
+            elif length == 1:
+                data = value[0:length]
             else:
                 data = value[0 : length - 1]
         elif t == TYPES.Short:  # SHORT