diff --git a/doc/Eqs/fix_wall_colloid.jpg b/doc/Eqs/fix_wall_colloid.jpg
index c59771d5c0..8168d3a792 100644
Binary files a/doc/Eqs/fix_wall_colloid.jpg and b/doc/Eqs/fix_wall_colloid.jpg differ
diff --git a/doc/Eqs/fix_wall_colloid.tex b/doc/Eqs/fix_wall_colloid.tex
index 64dcc15f44..3ed716c263 100644
--- a/doc/Eqs/fix_wall_colloid.tex
+++ b/doc/Eqs/fix_wall_colloid.tex
@@ -3,7 +3,7 @@
 \begin{document}
 
 \begin{eqnarray}
-E &=& 144 \epsilon \left[ \frac{\sigma^{6}}{7560} 
+E &=& \epsilon \left[ \frac{\sigma^{6}}{7560} 
   \left(\frac{6R-D}{D^{7}} + \frac{D+8R}{(D+2R)^{7}} \right) - 
   \frac{}{} \right. \nonumber \\
   &&\qquad \left. \frac{1}{6} \left(\frac{2R(D+R) + D(D+2R)