diff --git a/applications/test/sliceRange/Make/files b/applications/test/sliceRange/Make/files
index 6d24718f23..1446894ea3 100644
--- a/applications/test/sliceRange/Make/files
+++ b/applications/test/sliceRange/Make/files
@@ -1,3 +1,3 @@
-Test-sliceRange.C
+Test-sliceRange.cxx
 
 EXE = $(FOAM_USER_APPBIN)/Test-sliceRange
diff --git a/applications/test/sliceRange/Test-sliceRange.C b/applications/test/sliceRange/Test-sliceRange.cxx
similarity index 96%
rename from applications/test/sliceRange/Test-sliceRange.C
rename to applications/test/sliceRange/Test-sliceRange.cxx
index b3f4f8df8b..a9b4190ebe 100644
--- a/applications/test/sliceRange/Test-sliceRange.C
+++ b/applications/test/sliceRange/Test-sliceRange.cxx
@@ -25,6 +25,7 @@ License
 
 Description
     Test slice range
+
 \*---------------------------------------------------------------------------*/
 
 #include "argList.H"
@@ -157,7 +158,7 @@ int main(int argc, char *argv[])
 
     // Some iterator tests
     {
-        const sliceRange range(25, 8, 3);
+        sliceRange range(25, 8, 3);
 
         auto iter1 = range.begin();
         Info<< nl << "Forward iterator for " << range << nl;
@@ -166,6 +167,16 @@ int main(int argc, char *argv[])
         auto iter2 = range.rbegin();
         Info<< nl << "Reverse iterator for " << range << nl;
         printIteratorTest(iter2);
+
+
+        // Change the start, size
+        range.start() = 5;
+        range.size() = 4;
+
+        iter1 = range.begin();
+
+        Info<< nl << "Forward iterator for " << range << nl;
+        printIteratorTest(iter1);
     }
 
 
diff --git a/src/OpenFOAM/primitives/ranges/sliceRange/sliceRange.H b/src/OpenFOAM/primitives/ranges/sliceRange/sliceRange.H
index 6badfc0523..35176c42fb 100644
--- a/src/OpenFOAM/primitives/ranges/sliceRange/sliceRange.H
+++ b/src/OpenFOAM/primitives/ranges/sliceRange/sliceRange.H
@@ -112,23 +112,33 @@ public:
 
     // Access
 
-        //- The start value in the range
-        constexpr label start() const noexcept { return start_; }
-
-        //- The size of the range
-        constexpr label size() const noexcept { return size_; }
-
-        //- The stride for the range
-        constexpr label stride() const noexcept { return stride_; }
-
         //- True if range is empty (zero-sized)
         bool empty() const noexcept { return !size_; }
 
         //- True if range has size greater than zero
         bool good() const noexcept { return (size_ > 0); }
 
-        //- The (inclusive) lower value of the range.
-        constexpr label min() const noexcept { return start_; }
+        //- The size of the range
+        label size() const noexcept { return size_; }
+
+        //- Non-const access to size of the range
+        label& size() noexcept { return size_; }
+
+        //- The (inclusive) lower value of the range
+        label start() const noexcept { return start_; }
+
+        //- Non-const access to start of the range
+        label& start() noexcept { return start_; }
+
+        //- The stride for the range
+        label stride() const noexcept { return stride_; }
+
+        //- Non-const access to the stride
+        label& stride() noexcept { return stride_; }
+
+        //- The (inclusive) lower value of the range,
+        //- same as start()
+        label min() const noexcept { return start_; }
 
         //- The (inclusive) upper value of the range.
         //- Ill-defined for an empty range
@@ -195,7 +205,7 @@ public:
         class indexer
         {
             //- The stride when indexing
-            const label stride_;
+            label stride_;
 
             //- The global value
             label value_;