Line Styles and Font resource file into a dgn file

When creating a line style I have used a particular font. This font is no different to what has been used for the black text below. I have the font recourse file saved on my machine but my colleague hasn't. When my colleague opens the dgn the linestyle uses a different font, but the text in black that uses the same font appears ok. How can I fix this issue so that the linestyle appears the same as mine without the need of the font resource file?