diff --git a/tensorizer/serialization.py b/tensorizer/serialization.py
index b831bf8..59c3e84 100644
--- a/tensorizer/serialization.py
+++ b/tensorizer/serialization.py
@@ -3510,7 +3510,7 @@ def _mv_suffix(data: "collections.abc.Buffer", start: int):
         if not isinstance(data, memoryview):
             data = memoryview(data)
         try:
-            if data.ndim != 1:
+            if data.ndim != 1 or data.format != "B":
                 data = data.cast("B")
             return data[start:]
         finally: