using sed

I'm trying to use sed to append "/0.0.0.0" to the end of each line in a file

sed -i 's;$;/0.0.0.0;g' file.txt

problem is most of the time, "/0.0.0.0" is made as a new line after the existing ones, instead of being appended to the ends of the lines

so instead of:
text/0.0.0.0

I get:
text
/0.0.0.0

>>6
What did you expect? If you want an answer, ask a question.
Don't be obtuse, it's obvious what I wanted to do.

It helps if the question demonstrates that you've read the relevant documentation before coming here. Which you haven't.
Actually finding relevant documentation for sed is like the fucking lottery.