diff --git a/Stream_lines_2/doc_tex/Stream_lines_2/Stream_lines_2_user.tex b/Stream_lines_2/doc_tex/Stream_lines_2/Stream_lines_2_user.tex
index e12dc9f60db..46f35f3c7e5 100644
--- a/Stream_lines_2/doc_tex/Stream_lines_2/Stream_lines_2_user.tex
+++ b/Stream_lines_2/doc_tex/Stream_lines_2/Stream_lines_2_user.tex
@@ -126,7 +126,7 @@ and backward.
 \end{center}
 \end{figure}
 
-This method introduces an intermediate point \ccc{p'_k} between $p_k$ and $p_{k+1}$ to increase the
+This method introduces an intermediate point $p'_k$ between $p_k$ and $p_{k+1}$ to increase the
 precision of the computation (see~Figure~\ref{runge_kutta_fig}), where:
 
 $$