diff --git a/dumux/boxmodels/1p/1pvolumevariables.hh b/dumux/boxmodels/1p/1pvolumevariables.hh
index ba4f3b6b77ec7510df03343d979d64aa9b641b72..8723324eb71b8e5e1233773c826aba9c68613722 100644
--- a/dumux/boxmodels/1p/1pvolumevariables.hh
+++ b/dumux/boxmodels/1p/1pvolumevariables.hh
@@ -141,7 +141,7 @@ public:
     { return fluidState_.pressure(/*phaseIdx=*/0); }
 
     /*!
-     * \brief Return the mass density \f$\mathrm{[kg/m13]}\f$ of a given phase within the
+     * \brief Return the mass density \f$\mathrm{[kg/m^3]}\f$ of a given phase within the
      *        control volume.
      */
     Scalar density() const