diff --git a/piexif/_exif.py b/piexif/_exif.py
index a34cb86..fc0200d 100644
--- a/piexif/_exif.py
+++ b/piexif/_exif.py
@@ -32,7 +32,11 @@ class TYPES:
 }
 
 
-TYPE_LENGTH = {t: calcsize('=' + f) for t, f in TYPE_FORMAT.items() if f}
+TYPE_LENGTH = {
+    t: calcsize('=' + f)
+    for t, f in TYPE_FORMAT.items()
+    if f
+}
 
 
 SIMPLE_NUMERICS = [
diff --git a/piexif/_load.py b/piexif/_load.py
index 50bf5a6..9e2d047 100644
--- a/piexif/_load.py
+++ b/piexif/_load.py
@@ -117,9 +117,8 @@ def get_ifd_dict(self, pointer, ifd_name, read_unknown=False):
     def _read_tag(self, pointer):
         tag, value_type, value_num = self._unpack_from("HHL", pointer)
         # Treat unknown types as `Undefined`
-        value_length = TYPE_LENGTH.get(value_type, 1)
-        value_length_total = value_length * value_num
-        if value_length_total > 4:
+        value_length = TYPE_LENGTH.get(value_type, 1) * value_num
+        if value_length > 4:
             data_pointer = self._unpack_from("L", pointer + 8)[0]
         else:
             data_pointer = pointer + 8
@@ -130,8 +129,8 @@ def _read_tag(self, pointer):
             # Ascii, Undefined and unknown types
             if value_type == TYPES.Ascii:
                 # Crop ending zero
-                value_length_total = max(0, value_length_total - 1)
-            raw_value = self.tiftag[data_pointer:data_pointer+value_length_total]
+                value_length = max(0, value_length - 1)
+            raw_value = self.tiftag[data_pointer:data_pointer+value_length]
             values = (raw_value, )
         else:
             # Unpacked types