diff --git a/exercises/exercise-properties/README.md b/exercises/exercise-properties/README.md
index 1c0da0c3c46d93a0e3bdcb758bfc6902e5812804..ac39a774ef0b53ad098984820105bfef3142db47 100644
--- a/exercises/exercise-properties/README.md
+++ b/exercises/exercise-properties/README.md
@@ -67,7 +67,7 @@ SET_TYPE_PROP(TwoPIncompressible, LocalResidual,
               MyLocalResidual<TypeTag>);
 ```
 
-You want to simplify the original local residual by using the assumption that incompressible fluid phases are present. As a consequence, one can balance phase volume instead of phase mass.
+You want to simplify the original local residual by using the assumption that only incompressible fluid phases are present. As a consequence, one can balance phase volume instead of phase mass.
 
 * Eliminate the density from the `computeStorage` and the `computeFlux` methods.