diff --git a/slpkg/checksum.py b/slpkg/checksum.py
index f82a2bdd..ec9b6953 100644
--- a/slpkg/checksum.py
+++ b/slpkg/checksum.py
@@ -34,9 +34,9 @@ class Md5sum:
         filename = source_file.split('/')[-1]
         source_path = Path(path, filename)
 
-        md5 = self.read_binary_file(source_path)
+        md5: bytes = self.read_binary_file(source_path)
         file_check: str = hashlib.md5(md5).hexdigest()
-        checksum = "".join(checksum)
+        checksum: str = "".join(checksum)
 
         if file_check != checksum:
             self.ascii.draw_checksum_error_box(filename, checksum, file_check)