diff --git a/etc/templates/closedVolume/system/blockMeshDict b/etc/templates/closedVolume/system/blockMeshDict
index 2163314dc6..7f6fb71db6 100644
--- a/etc/templates/closedVolume/system/blockMeshDict
+++ b/etc/templates/closedVolume/system/blockMeshDict
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type wall;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/closedVolumeRotating/system/blockMeshDict b/etc/templates/closedVolumeRotating/system/blockMeshDict
index f61b9d6cbc..d059530e41 100644
--- a/etc/templates/closedVolumeRotating/system/blockMeshDict
+++ b/etc/templates/closedVolumeRotating/system/blockMeshDict
@@ -187,7 +187,8 @@ edges
 
 defaultPatch
 {
-    type wall;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/closedVolumeRotating/system/blockMeshDict-box b/etc/templates/closedVolumeRotating/system/blockMeshDict-box
index 2163314dc6..7f6fb71db6 100644
--- a/etc/templates/closedVolumeRotating/system/blockMeshDict-box
+++ b/etc/templates/closedVolumeRotating/system/blockMeshDict-box
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type wall;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/compressibleInflowOutflow/system/blockMeshDict b/etc/templates/compressibleInflowOutflow/system/blockMeshDict
index a6c22fa459..f22e14ba00 100644
--- a/etc/templates/compressibleInflowOutflow/system/blockMeshDict
+++ b/etc/templates/compressibleInflowOutflow/system/blockMeshDict
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type patch;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/inflowOutflow/system/blockMeshDict b/etc/templates/inflowOutflow/system/blockMeshDict
index a6c22fa459..f22e14ba00 100644
--- a/etc/templates/inflowOutflow/system/blockMeshDict
+++ b/etc/templates/inflowOutflow/system/blockMeshDict
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type patch;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/inflowOutflowRotating/system/blockMeshDict b/etc/templates/inflowOutflowRotating/system/blockMeshDict
index 992debcaa9..69ba8cda2b 100644
--- a/etc/templates/inflowOutflowRotating/system/blockMeshDict
+++ b/etc/templates/inflowOutflowRotating/system/blockMeshDict
@@ -187,7 +187,8 @@ edges
 
 defaultPatch
 {
-    type patch;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/inflowOutflowRotating/system/blockMeshDict-box b/etc/templates/inflowOutflowRotating/system/blockMeshDict-box
index a6c22fa459..f22e14ba00 100644
--- a/etc/templates/inflowOutflowRotating/system/blockMeshDict-box
+++ b/etc/templates/inflowOutflowRotating/system/blockMeshDict-box
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type patch;
+    name background;
+    type internal;
 }
 
 boundary
diff --git a/etc/templates/singleFluidCHT/system/blockMeshDict b/etc/templates/singleFluidCHT/system/blockMeshDict
index a6c22fa459..f22e14ba00 100644
--- a/etc/templates/singleFluidCHT/system/blockMeshDict
+++ b/etc/templates/singleFluidCHT/system/blockMeshDict
@@ -58,7 +58,8 @@ edges
 
 defaultPatch
 {
-    type patch;
+    name background;
+    type internal;
 }
 
 boundary