diff --git a/sopass.py b/sopass.py
index aace876..0afbb6a 100755
--- a/sopass.py
+++ b/sopass.py
@@ -25,7 +25,7 @@ class Direction:
 def hexdump(data: bytes) -> list[str]: # We will be prefixing the lines with sigils, so no need to join.
 	result = []
 	offset = 0
-	offset_len = math.ceil(math.log(len(data), 16))
+	offset_len = math.ceil(math.log(len(data)+1, 16))
 	while data:
 		left_chunk, right_chunk, data = data[:8], data[8:16], data[16:]
 		left_ascii = ''.join(chr(x) if x in range(32,127) else '.' for x in left_chunk)