diff --git a/ProcessLib/Parameter/ConstantParameter.cpp b/ProcessLib/Parameter/ConstantParameter.cpp
index b536a2589f8ef758c2fad07656618d5f32b11a2f..ab3e051c746920f83b79e440d9b57f8eb35cb8ad 100644
--- a/ProcessLib/Parameter/ConstantParameter.cpp
+++ b/ProcessLib/Parameter/ConstantParameter.cpp
@@ -19,7 +19,7 @@ std::unique_ptr<ParameterBase> createConstantParameter(
     //! \ogs_file_param{parameter__type}
     config.checkConfigParameter("type", "Constant");
     //! \ogs_file_param{parameter__Constant__value}
-    auto value = config.getConfigParameter<double>("value");
+    auto const value = config.getConfigParameter<double>("value");
     DBUG("Using value %g", value);
 
     return std::unique_ptr<ParameterBase>(new ConstantParameter<double>(value));
diff --git a/ProcessLib/Parameter/MeshElementParameter.cpp b/ProcessLib/Parameter/MeshElementParameter.cpp
index eb3b070535d78b30df3907cb72407bfd755b45c3..d21ffdeb9dfa110ff40d1ef74a6392d6c29f469b 100644
--- a/ProcessLib/Parameter/MeshElementParameter.cpp
+++ b/ProcessLib/Parameter/MeshElementParameter.cpp
@@ -20,7 +20,7 @@ std::unique_ptr<ParameterBase> createMeshElementParameter(
     //! \ogs_file_param{parameter__type}
     config.checkConfigParameter("type", "MeshElement");
     //! \ogs_file_param{parameter__MeshElement__field_name}
-    auto field_name = config.getConfigParameter<std::string>("field_name");
+    auto const field_name = config.getConfigParameter<std::string>("field_name");
     DBUG("Using field_name %s", field_name.c_str());
 
     if (!mesh.getProperties().hasPropertyVector(field_name)) {
diff --git a/ProcessLib/Parameter/MeshNodeParameter.cpp b/ProcessLib/Parameter/MeshNodeParameter.cpp
index 63725778bd963c342e8a7e2312b1eb5185f2472f..af986ad603c0471b061dd259971c9090e93d5ccc 100644
--- a/ProcessLib/Parameter/MeshNodeParameter.cpp
+++ b/ProcessLib/Parameter/MeshNodeParameter.cpp
@@ -20,7 +20,7 @@ std::unique_ptr<ParameterBase> createMeshNodeParameter(
     //! \ogs_file_param{parameter__type}
     config.checkConfigParameter("type", "MeshNode");
     //! \ogs_file_param{parameter__MeshNode__field_name}
-    auto field_name = config.getConfigParameter<std::string>("field_name");
+    auto const field_name = config.getConfigParameter<std::string>("field_name");
     DBUG("Using field_name %s", field_name.c_str());
 
     if (!mesh.getProperties().hasPropertyVector(field_name)) {
diff --git a/ProcessLib/Parameter/Parameter.cpp b/ProcessLib/Parameter/Parameter.cpp
index 3be7139560cf1df7e7e4a4a30afa56719f255356..8655e90182882c6bbcd61910102151baea26876d 100644
--- a/ProcessLib/Parameter/Parameter.cpp
+++ b/ProcessLib/Parameter/Parameter.cpp
@@ -23,9 +23,9 @@ std::unique_ptr<ParameterBase> createParameter(
 {
 
     //! \ogs_file_param{parameter__name}
-    auto name = config.getConfigParameter<std::string>("name");
+    auto const name = config.getConfigParameter<std::string>("name");
     //! \ogs_file_param{parameter__type}
-    auto type = config.peekConfigParameter<std::string>("type");
+    auto const type = config.peekConfigParameter<std::string>("type");
 
     // Create parameter based on the provided type.
     if (type == "Constant")