diff --git a/Examples/Tests/pec/inputs_test_2d_pec_field_insulator b/Examples/Tests/pec/inputs_test_2d_pec_field_insulator
index 3629d84a20e..68a8df1b600 100644
--- a/Examples/Tests/pec/inputs_test_2d_pec_field_insulator
+++ b/Examples/Tests/pec/inputs_test_2d_pec_field_insulator
@@ -14,8 +14,8 @@ geometry.prob_lo = 0.     2.e-2 # physical domain
 geometry.prob_hi = 1.e-2  3.e-2
 
 # Boundary condition
-boundary.field_lo = neumann       periodic
-boundary.field_hi = pec_insulator periodic
+boundary.field_lo = neumann      periodic
+boundary.field_hi = PECInsulator periodic
 
 warpx.serialize_initial_conditions = 1
 
diff --git a/Source/BoundaryConditions/PEC_Insulator.cpp b/Source/BoundaryConditions/PEC_Insulator.cpp
index 141be57feb5..d1e2f11805b 100644
--- a/Source/BoundaryConditions/PEC_Insulator.cpp
+++ b/Source/BoundaryConditions/PEC_Insulator.cpp
@@ -97,8 +97,8 @@ namespace
             // Loop over sides, iside = -1 (lo), iside = +1 (hi)
             for (int iside = -1; iside <= +1; iside += 2) {
                 bool const isPEC_InsulatorBoundary = ( (iside == -1)
-                    ? fbndry_lo[idim] == FieldBoundaryType::PEC_Insulator
-                    : fbndry_hi[idim] == FieldBoundaryType::PEC_Insulator );
+                    ? fbndry_lo[idim] == FieldBoundaryType::PECInsulator
+                    : fbndry_hi[idim] == FieldBoundaryType::PECInsulator );
                 if (isPEC_InsulatorBoundary) {
                     isInsulatorBoundary = ( (iside == -1)
                         ? is_insulator_lo[idim] == 1
diff --git a/Source/BoundaryConditions/WarpXFieldBoundaries.cpp b/Source/BoundaryConditions/WarpXFieldBoundaries.cpp
index dec78037127..b428dbd2018 100644
--- a/Source/BoundaryConditions/WarpXFieldBoundaries.cpp
+++ b/Source/BoundaryConditions/WarpXFieldBoundaries.cpp
@@ -91,7 +91,7 @@ void WarpX::ApplyEfieldBoundary(const int lev, PatchType patch_type)
         }
     }
 
-    if (::isAnyBoundary<FieldBoundaryType::PEC_Insulator>(field_boundary_lo, field_boundary_hi)) {
+    if (::isAnyBoundary<FieldBoundaryType::PECInsulator>(field_boundary_lo, field_boundary_hi)) {
         amrex::Real const tnew = gett_new(lev);
         if (patch_type == PatchType::fine) {
             pec_insulator_boundary->ApplyPEC_InsulatortoEfield(
@@ -167,7 +167,7 @@ void WarpX::ApplyBfieldBoundary (const int lev, PatchType patch_type, DtType a_d
         }
     }
 
-    if (::isAnyBoundary<FieldBoundaryType::PEC_Insulator>(field_boundary_lo, field_boundary_hi)) {
+    if (::isAnyBoundary<FieldBoundaryType::PECInsulator>(field_boundary_lo, field_boundary_hi)) {
         amrex::Real const tnew = gett_new(lev);
         if (patch_type == PatchType::fine) {
             pec_insulator_boundary->ApplyPEC_InsulatortoBfield( {
diff --git a/Source/Utils/WarpXAlgorithmSelection.H b/Source/Utils/WarpXAlgorithmSelection.H
index a680fc72a44..088ef295364 100644
--- a/Source/Utils/WarpXAlgorithmSelection.H
+++ b/Source/Utils/WarpXAlgorithmSelection.H
@@ -132,7 +132,7 @@ AMREX_ENUM(FieldBoundaryType,
            Open,    // Used in the Integrated Green Function Poisson solver
                     // Note that the solver implicitely assumes open BCs:
                     // no need to enforce them separately
-           PEC_Insulator // Mixed boundary with PEC and insulator
+           PECInsulator, // Mixed boundary with PEC and insulator
            Default = PML);
 
 /** Particle boundary conditions at the domain boundary