diff --git a/src/finiteVolume/fields/fvsPatchFields/derived/nonConformalMappedPolyFaces/nonConformalMappedPolyFacesFvsPatchLabelField.C b/src/finiteVolume/fields/fvsPatchFields/derived/nonConformalMappedPolyFaces/nonConformalMappedPolyFacesFvsPatchLabelField.C
index e031dd62e1..90dbd7c77d 100644
--- a/src/finiteVolume/fields/fvsPatchFields/derived/nonConformalMappedPolyFaces/nonConformalMappedPolyFacesFvsPatchLabelField.C
+++ b/src/finiteVolume/fields/fvsPatchFields/derived/nonConformalMappedPolyFaces/nonConformalMappedPolyFacesFvsPatchLabelField.C
@@ -62,7 +62,7 @@ nonConformalMappedPolyFacesFvsPatchLabelField
     (
         db().time().processorCase()
       ? dict.lookup<labelList>("procOffsets")
-      : labelList(1, 0)
+      : labelList(1, label(0))
     )
 {
     labelField::operator=
diff --git a/src/meshTools/patchIntersection/FacePatchIntersection.C b/src/meshTools/patchIntersection/FacePatchIntersection.C
index 1dc5b960f8..23fbd6dd4f 100644
--- a/src/meshTools/patchIntersection/FacePatchIntersection.C
+++ b/src/meshTools/patchIntersection/FacePatchIntersection.C
@@ -533,9 +533,9 @@ Foam::FacePatchIntersection<SrcPatchType, TgtPatchType>::FacePatchIntersection
         inplaceRenumber(oldPointNewPoints, this->tgtEdgePoints_);
 
         // Remove deleted points
-        inplaceRemove(this->faces_, -1);
-        inplaceRemove(this->srcEdgePoints_, -1);
-        inplaceRemove(this->tgtEdgePoints_, -1);
+        inplaceRemove(this->faces_, label(-1));
+        inplaceRemove(this->srcEdgePoints_, label(-1));
+        inplaceRemove(this->tgtEdgePoints_, label(-1));
     }
 
     // Step 6: Reporting
diff --git a/src/meshTools/patchIntersection/TriPatchIntersection.C b/src/meshTools/patchIntersection/TriPatchIntersection.C
index 43b94e8ee1..f4619d4fe5 100644
--- a/src/meshTools/patchIntersection/TriPatchIntersection.C
+++ b/src/meshTools/patchIntersection/TriPatchIntersection.C
@@ -695,7 +695,7 @@ Foam::TriPatchIntersection<SrcPatchType, TgtPatchType>::edgePatchEdge
 
         if (patchPointi == -1)
         {
-            return pointPatchEdges[pointi] == -1 ? 0 : 1;
+            return pointPatchEdges[pointi] == -1 ? label(0) : label(1);
         }
         else
         {
@@ -1628,7 +1628,7 @@ Foam::TriPatchIntersection<SrcPatchType, TgtPatchType>::snapPatchFaceTris
     checkPatchFace(tgtFacei, false);
 
     // Insertion workspace
-    labelList insertPointis(1), insertEdgeis(2, -1), fixedEdgeis(0);
+    labelList insertPointis(1), insertEdgeis(2, label(-1)), fixedEdgeis(0);
 
     // Do source-point-target-edge snapping
     forAll(srcFaceSnapTgtFaceEdge, srcFacePointi)
@@ -2427,7 +2427,7 @@ Foam::TriPatchIntersection<SrcPatchType, TgtPatchType>::conformPatchFaceTris
             }
         }
 
-        return -1;
+        return label(-1);
     };
 
     // Track from a point on a triangle towards a given point. Stop at an edge