diff --git a/opm/core/fluid/blackoil/BlackoilPvtProperties.hpp b/opm/core/fluid/blackoil/BlackoilPvtProperties.hpp
index fbb744d4e..3bc71ec78 100644
--- a/opm/core/fluid/blackoil/BlackoilPvtProperties.hpp
+++ b/opm/core/fluid/blackoil/BlackoilPvtProperties.hpp
@@ -63,7 +63,7 @@ namespace Opm
         const int* phasePosition() const;
 
         /// Densities of stock components at surface conditions.
-        /// \return  Array of size MaxNumPhases
+        /// \return  Array of size numPhases().
 	const double* surfaceDensities() const;
 
         /// Viscosity as a function of p and z.