diff --git a/doc/src/Eqs/pair_drip.jpg b/doc/src/Eqs/pair_drip.jpg
index 726bb32cb8..a94b4141b0 100644
Binary files a/doc/src/Eqs/pair_drip.jpg and b/doc/src/Eqs/pair_drip.jpg differ
diff --git a/doc/src/Eqs/pair_drip.tex b/doc/src/Eqs/pair_drip.tex
index 3b7a3ea991..079a2cdf84 100644
--- a/doc/src/Eqs/pair_drip.tex
+++ b/doc/src/Eqs/pair_drip.tex
@@ -5,8 +5,7 @@
 \begin{document}
 
 \begin{eqnarray*}
-E &=& \frac{1}{2} \sum_{i} \sum_{j\notin\text{layer}\,i} (\phi_{ij} + \phi_{ji}) \\
-\phi_{ij} &=& f_\text{c}(x_r) \left[ e^{-\lambda(r_{ij} - z_0 )} \left[C+f(\rho_{ij})+  g(\rho_{ij}, \{\alpha_{ij}^{(m)}\}) \right]- A\left (\frac{z_0}{r_{ij}} \right)^6 \right] \\
+E &=& \frac{1}{2} \sum_{i} \sum_{j\notin\text{layer}\,i} \phi_{ij} \\\phi_{ij} &=& f_\text{c}(x_r) \left[ e^{-\lambda(r_{ij} - z_0 )} \left[C+f(\rho_{ij})+  g(\rho_{ij}, \{\alpha_{ij}^{(m)}\}) \right]- A\left (\frac{z_0}{r_{ij}} \right)^6 \right] \\
 \end{eqnarray*}