diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index 3695956337b0122487fa470adfb588a8c5f019e4..da3020b3c1731e7e80dde5fd30cf1a0b98cc3741 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -98,7 +98,7 @@ int main(int argc, char *argv[]) {
     auto const shearViscosity = parset.get<double>("body.shearViscosity");
     auto const bulkViscosity = parset.get<double>("body.bulkViscosity");
     auto const density = parset.get<double>("body.density");
-    double const gravity = 9.81;
+    auto const gravity = parset.get<double>("gravity");
 
     // {{{ Set up grid
     using Grid = Dune::ALUGrid<dims, dims, Dune::simplex, Dune::nonconforming>;
diff --git a/src/one-body-sample.parset b/src/one-body-sample.parset
index e10ed132aa7c24f89fc1eb462361b7d3468e43dc..1dfd57691bf1c30094abd39556742691e5854f7c 100644
--- a/src/one-body-sample.parset
+++ b/src/one-body-sample.parset
@@ -1,4 +1,6 @@
 # -*- mode:conf -*-
+gravity         = 9.81
+
 [io]
 printProgress = false
 writeVTK      = false