diff --git a/applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/coalescenceModels/Luo/Luo.H b/applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/coalescenceModels/Luo/Luo.H
index eafc7db02c..bd3a45a49e 100644
--- a/applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/coalescenceModels/Luo/Luo.H
+++ b/applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/coalescenceModels/Luo/Luo.H
@@ -28,7 +28,7 @@ Description
     Model of Luo (1993). The coalescence rate is calculated by
 
     \f[
-       &\frac{\pi}{4} (d_i + d_j)^2 u_{ij}
+        \frac{\pi}{4} (d_i + d_j)^2 u_{ij}
         \mathrm{exp}
         \left[
           - C_1