diff --git a/pyrdp/parser/rdp/virtual_channel/clipboard.py b/pyrdp/parser/rdp/virtual_channel/clipboard.py
index 4904531b..1a22c157 100644
--- a/pyrdp/parser/rdp/virtual_channel/clipboard.py
+++ b/pyrdp/parser/rdp/virtual_channel/clipboard.py
@@ -105,6 +105,8 @@ def parseFormatList(self, payload, msgFlags):
 
             while lastChar != b"\x00\x00":
                 lastChar = stream.read(2)
+                if len(lastChar) < 2:
+                    raise ValueError("Format name is not null-terminated")
                 formatName += lastChar
 
             self.formats[formatId] = LongFormatName(formatId, formatName)