diff --git a/src/MeshKernelNET/Api/IMeshKernelApi.cs b/src/MeshKernelNET/Api/IMeshKernelApi.cs
index edaaa253..8f8b32b0 100644
--- a/src/MeshKernelNET/Api/IMeshKernelApi.cs
+++ b/src/MeshKernelNET/Api/IMeshKernelApi.cs
@@ -386,6 +386,7 @@ int CurvilinearLineAttractionRepulsion(int meshKernelId,
         /// </summary>
         /// <param name="meshKernelId">The id of the mesh state</param>
         /// <param name="mirroringFactor">The x coordinate of the first node of the set line</param>
+        /// <param name="numRowsToGenerate">The number of rows to generate</param>
         /// <param name="xFirstGridLineNode">The x coordinate of the first node of the set line</param>
         /// <param name="yFirstGridLineNode">The y coordinate of the first node of the set line </param>
         /// <param name="xSecondGridLineNode">The x coordinate of the second node of the set line </param>
@@ -393,6 +394,7 @@ int CurvilinearLineAttractionRepulsion(int meshKernelId,
         /// <returns>Error code</returns>
         int CurvilinearLineMirror(int meshKernelId,
                                   double mirroringFactor,
+                                  int numRowsToGenerate,
                                   double xFirstGridLineNode,
                                   double yFirstGridLineNode,
                                   double xSecondGridLineNode,
diff --git a/src/MeshKernelNET/Api/MeshKernelApi.cs b/src/MeshKernelNET/Api/MeshKernelApi.cs
index 70645fc5..c94a3b55 100644
--- a/src/MeshKernelNET/Api/MeshKernelApi.cs
+++ b/src/MeshKernelNET/Api/MeshKernelApi.cs
@@ -393,6 +393,7 @@ public int CurvilinearLineAttractionRepulsion(int meshKernelId,
 
         public int CurvilinearLineMirror(int meshKernelId,
                                          double mirroringFactor,
+                                         int numRowsToGenerate,
                                          double xFirstGridLineNode,
                                          double yFirstGridLineNode,
                                          double xSecondGridLineNode,
@@ -400,6 +401,7 @@ public int CurvilinearLineMirror(int meshKernelId,
         {
             return MeshKernelDll.CurvilinearLineMirror(meshKernelId,
                                                        mirroringFactor,
+                                                       numRowsToGenerate,
                                                        xFirstGridLineNode,
                                                        yFirstGridLineNode,
                                                        xSecondGridLineNode,
diff --git a/src/MeshKernelNET/Native/MeshKernelDll.cs b/src/MeshKernelNET/Native/MeshKernelDll.cs
index 8f6329dc..0e7839f9 100644
--- a/src/MeshKernelNET/Native/MeshKernelDll.cs
+++ b/src/MeshKernelNET/Native/MeshKernelDll.cs
@@ -427,6 +427,7 @@ internal static extern int CurvilinearLineAttractionRepulsion([In] int meshKerne
         /// </summary>
         /// <param name="meshKernelId">The id of the mesh state</param>
         /// <param name="mirroringFactor">The x coordinate of the first node of the set line</param>
+        /// <param name="numRowsToGenerate">The number of rows to generate</param>
         /// <param name="xFirstGridLineNode">The x coordinate of the first node of the set line</param>
         /// <param name="yFirstGridLineNode">The y coordinate of the first node of the set line </param>
         /// <param name="xSecondGridLineNode">The x coordinate of the second node of the set line </param>
@@ -435,6 +436,7 @@ internal static extern int CurvilinearLineAttractionRepulsion([In] int meshKerne
         [DllImport(MeshKernelDllName, EntryPoint = "mkernel_curvilinear_line_mirror", CallingConvention = CallingConvention.Cdecl)]
         internal static extern int CurvilinearLineMirror([In] int meshKernelId,
                                                          [In] double mirroringFactor,
+                                                         [In] int numRowsToGenerate,
                                                          [In] double xFirstGridLineNode,
                                                          [In] double yFirstGridLineNode,
                                                          [In] double xSecondGridLineNode,
diff --git a/test/MeshKernelNETTest/Api/MeshKernelCurvilinearTest.cs b/test/MeshKernelNETTest/Api/MeshKernelCurvilinearTest.cs
index fd72a276..3705fafa 100644
--- a/test/MeshKernelNETTest/Api/MeshKernelCurvilinearTest.cs
+++ b/test/MeshKernelNETTest/Api/MeshKernelCurvilinearTest.cs
@@ -884,7 +884,7 @@ public void CurvilinearLineMirrorThroughAPI()
 
                     Assert.AreEqual(0, api.CurvilinearSet(id, grid));
                     // Execute
-                    Assert.AreEqual(0, api.CurvilinearLineMirror(id, 1.2, 0.0, 0.0, 0.0, 50.0));
+                    Assert.AreEqual(0, api.CurvilinearLineMirror(id, 1.2, 1, 0.0, 0.0, 0.0, 50.0));
                     // Assert
                     Assert.AreEqual(0, api.CurvilinearGridGetData(id, out curvilinearGrid));