diff --git a/include/wx/generic/gridsel.h b/include/wx/generic/gridsel.h
index 18377431ef..d613283f66 100644
--- a/include/wx/generic/gridsel.h
+++ b/include/wx/generic/gridsel.h
@@ -28,8 +28,8 @@ public:
                     wxGrid::wxGridSelectionModes sel = wxGrid::wxGridSelectCells);
 
     bool IsSelection();
-    bool IsInSelection(int row, int col);
-    bool IsInSelection(const wxGridCellCoords& coords)
+    bool IsInSelection(int row, int col) const;
+    bool IsInSelection(const wxGridCellCoords& coords) const
     {
         return IsInSelection(coords.GetRow(), coords.GetCol());
     }
diff --git a/src/generic/gridsel.cpp b/src/generic/gridsel.cpp
index 0288f9a66a..d4953c59d2 100644
--- a/src/generic/gridsel.cpp
+++ b/src/generic/gridsel.cpp
@@ -55,7 +55,7 @@ bool wxGridSelection::IsSelection()
     return !m_selection.empty();
 }
 
-bool wxGridSelection::IsInSelection( int row, int col )
+bool wxGridSelection::IsInSelection( int row, int col ) const
 {
     // Check whether the given cell is contained in one of the selected blocks.
     //