diff --git a/include/wx/html/htmlcell.h b/include/wx/html/htmlcell.h
index 20816b9525..b76b13c769 100644
--- a/include/wx/html/htmlcell.h
+++ b/include/wx/html/htmlcell.h
@@ -280,7 +280,7 @@ public:
     // Returned value : true if pagebreak was modified, false otherwise
     // Usage : while (container->AdjustPagebreak(&p)) {}
     virtual bool AdjustPagebreak(int *pagebreak,
-                                 wxArrayInt& known_pagebreaks) const;
+                                 const wxArrayInt& known_pagebreaks) const;
 
     // Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
     // is true - the cell can be split on two pages
@@ -440,7 +440,7 @@ public:
     virtual void DrawInvisible(wxDC& dc, int x, int y,
                                wxHtmlRenderingInfo& info);
 /*    virtual bool AdjustPagebreak(int *pagebreak, int *known_pagebreaks = NULL, int number_of_pages = 0) const;*/
-    virtual bool AdjustPagebreak(int *pagebreak, wxArrayInt& known_pagebreaks) const;
+    virtual bool AdjustPagebreak(int *pagebreak, const wxArrayInt& known_pagebreaks) const;
 
     // insert cell at the end of m_Cells list
     void InsertCell(wxHtmlCell *cell);
diff --git a/interface/wx/html/htmlcell.h b/interface/wx/html/htmlcell.h
index ece319d281..ab2edae710 100644
--- a/interface/wx/html/htmlcell.h
+++ b/interface/wx/html/htmlcell.h
@@ -107,7 +107,7 @@ public:
         @endcode
     */
     virtual bool AdjustPagebreak(int* pagebreak,
-                                 wxArrayInt& known_pagebreaks) const;
+                                 const wxArrayInt& known_pagebreaks) const;
 
     /**
         Renders the cell.
diff --git a/src/html/htmlcell.cpp b/src/html/htmlcell.cpp
index c775d9817f..20c249ebbf 100644
--- a/src/html/htmlcell.cpp
+++ b/src/html/htmlcell.cpp
@@ -221,7 +221,7 @@ wxCursor wxHtmlCell::GetMouseCursor(wxHtmlWindowInterface *window) const
 
 
 bool wxHtmlCell::AdjustPagebreak(int *pagebreak,
-                                 wxArrayInt& WXUNUSED(known_pagebreaks)) const
+                                 const wxArrayInt& WXUNUSED(known_pagebreaks)) const
 {
     if ((!m_CanLiveOnPagebreak) &&
                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
@@ -775,7 +775,7 @@ int wxHtmlContainerCell::GetIndentUnits(int ind) const
 
 
 bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak,
-                                          wxArrayInt& known_pagebreaks) const
+                                          const wxArrayInt& known_pagebreaks) const
 {
     if (!m_CanLiveOnPagebreak)
         return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks);
diff --git a/src/html/m_layout.cpp b/src/html/m_layout.cpp
index c54b437c86..7672465f96 100644
--- a/src/html/m_layout.cpp
+++ b/src/html/m_layout.cpp
@@ -71,7 +71,7 @@ public:
     wxHtmlPageBreakCell() {}
 
     bool AdjustPagebreak(int* pagebreak,
-                         wxArrayInt& known_pagebreaks) const;
+                         const wxArrayInt& known_pagebreaks) const;
 
     void Draw(wxDC& WXUNUSED(dc),
               int WXUNUSED(x), int WXUNUSED(y),
@@ -82,7 +82,7 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxHtmlPageBreakCell);
 };
 
-bool wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, wxArrayInt& known_pagebreaks) const
+bool wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, const wxArrayInt& known_pagebreaks) const
 {
     // When we are counting pages, 'known_pagebreaks' is non-NULL.
     // That's the only time we change 'pagebreak'. Otherwise, pages