diff --git a/src/solver.cpp b/src/solver.cpp
index 6417432dee0a72c49e93318b7c34ad68cd810ef3..800293aab9c86d370b3aa34642209eb16b139d7c 100644
--- a/src/solver.cpp
+++ b/src/solver.cpp
@@ -91,7 +91,7 @@ std::string serialize(solver::SolverSettings settings) {
          << zz.low << std::endl;
   buffer << "  geometry.prob_hi     = " << xx.high << " " << yy.high << " "
          << zz.high << std::endl;
-  buffer << "  geometry.n_cell      = " << xx.n_cell << " " << yy.n_cell << " "
+  buffer << "  amr.n_cell      = " << xx.n_cell << " " << yy.n_cell << " "
          << zz.n_cell;
   return buffer.str();
 }
diff --git a/tests/solver.t.cpp b/tests/solver.t.cpp
index 82e36aa1f6e3460b197426be10f4f0652ddddde8..0d97270a155e5d19f0a44860bf8d78e6618eb582 100644
--- a/tests/solver.t.cpp
+++ b/tests/solver.t.cpp
@@ -95,5 +95,5 @@ TEST_CASE("serialize", "[]") {
   geometry.is_periodic = 0 1 0
   geometry.prob_lo     = 0 0 0
   geometry.prob_hi     = 0.004 0.001 0.001
-  geometry.n_cell      = 11 22 33)");
+  amr.n_cell      = 11 22 33)");
 }