diff --git a/Bootup Logo/python_logo_converter/img2ts100.py b/Bootup Logo/python_logo_converter/img2ts100.py
index 8587c7f7..8d8377c1 100644
--- a/Bootup Logo/python_logo_converter/img2ts100.py	
+++ b/Bootup Logo/python_logo_converter/img2ts100.py	
@@ -42,8 +42,8 @@ def intel_hex_line(record_type, offset, data):
     for byte in data:
         yield "{:02X}".format(byte)
 
-    # compute and write checksum (with DOS line ending for compatibility/safety)
-    yield "{:02X}\r\n".format((((sum(data,                   # sum data ...
+    # compute and write checksum (now using unix style line endings for DFU3.45 compatibility
+    yield "{:02X}\n".format((((sum(data,                   # sum data ...
                                      record_length           # ... and other ...
                                      + sum(split16(offset))  # ... fields ...
                                      + record_type)          # ... on line