diff --git a/framework/include/mfem/equation_systems/equation_system.h b/framework/include/mfem/equation_systems/equation_system.h
index 62437cb8..7784051f 100644
--- a/framework/include/mfem/equation_systems/equation_system.h
+++ b/framework/include/mfem/equation_systems/equation_system.h
@@ -67,7 +67,7 @@ class EquationSystem : public mfem::Operator
   virtual void Init(platypus::GridFunctions & gridfunctions,
                     const platypus::FESpaces & fespaces,
                     platypus::BCMap & bc_map,
-                    Coefficients & coefficients);
+                    platypus::Coefficients & coefficients);
   virtual void BuildLinearForms(platypus::BCMap & bc_map, platypus::Sources & sources);
   virtual void BuildBilinearForms();
   virtual void BuildMixedBilinearForms();
diff --git a/framework/include/mfem/materials/MFEMMaterial.h b/framework/include/mfem/materials/MFEMMaterial.h
index 14c49fde..d4a3e5c5 100644
--- a/framework/include/mfem/materials/MFEMMaterial.h
+++ b/framework/include/mfem/materials/MFEMMaterial.h
@@ -16,7 +16,7 @@ class MFEMMaterial : public GeneralUserObject
   virtual void initialize() override {}
   virtual void finalize() override {}
 
-  virtual void storeCoefficients(Subdomain & subdomain) {}
+  virtual void storeCoefficients(platypus::Subdomain & subdomain) {}
 
   std::vector<SubdomainName> blocks;
 };
diff --git a/framework/include/mfem/problem/MFEMProblem.h b/framework/include/mfem/problem/MFEMProblem.h
index e5d96002..55b93d98 100644
--- a/framework/include/mfem/problem/MFEMProblem.h
+++ b/framework/include/mfem/problem/MFEMProblem.h
@@ -173,7 +173,7 @@ class MFEMProblem : public ExternalProblem
   std::string _formulation_name;
   int _order;
 
-  Coefficients _coefficients;
+  platypus::Coefficients _coefficients;
   platypus::InputParameters _solver_options;
   platypus::Outputs _outputs;
   platypus::InputParameters _exec_params;
diff --git a/framework/src/mfem/equation_systems/equation_system.C b/framework/src/mfem/equation_systems/equation_system.C
index ac57a714..216d8fe7 100644
--- a/framework/src/mfem/equation_systems/equation_system.C
+++ b/framework/src/mfem/equation_systems/equation_system.C
@@ -225,7 +225,7 @@ void
 EquationSystem::Init(platypus::GridFunctions & gridfunctions,
                      const platypus::FESpaces & fespaces,
                      platypus::BCMap & bc_map,
-                     Coefficients & coefficients)
+                     platypus::Coefficients & coefficients)
 {
 
   // Add optional kernels to the EquationSystem
diff --git a/framework/src/mfem/problem/MFEMProblem.C b/framework/src/mfem/problem/MFEMProblem.C
index 34361880..ccb3c249 100644
--- a/framework/src/mfem/problem/MFEMProblem.C
+++ b/framework/src/mfem/problem/MFEMProblem.C
@@ -172,7 +172,7 @@ MFEMProblem::addMaterial(const std::string & kernel_name,
   for (unsigned int bid = 0; bid < mfem_material.blocks.size(); ++bid)
   {
     int block = std::stoi(mfem_material.blocks[bid]);
-    Subdomain mfem_subdomain(name, block);
+    platypus::Subdomain mfem_subdomain(name, block);
     mfem_material.storeCoefficients(mfem_subdomain);
     _coefficients._subdomains.push_back(mfem_subdomain);
   }