diff --git a/src/richtext/richtextbuffer.cpp b/src/richtext/richtextbuffer.cpp
index 0b6c1e2843..c47cbca289 100644
--- a/src/richtext/richtextbuffer.cpp
+++ b/src/richtext/richtextbuffer.cpp
@@ -6843,7 +6843,7 @@ bool wxRichTextPlainText::Draw(wxDC& dc, wxRichTextDrawingContext& context, cons
     {
         if (textAttr.HasTextEffects() && (textAttr.GetTextEffects() & wxTEXT_ATTR_EFFECT_SMALL_CAPITALS))
         {
-            textFont.SetPointSize((int) (textFont.GetPointSize()*0.75));
+            textFont.SetFractionalPointSize(textFont.GetFractionalPointSize()*0.75);
             wxCheckSetFont(dc, textFont);
             charHeight = dc.GetCharHeight();
         }
@@ -6859,8 +6859,7 @@ bool wxRichTextPlainText::Draw(wxDC& dc, wxRichTextDrawingContext& context, cons
             }
             else
             {
-                double size = static_cast<double>(textFont.GetPointSize()) / wxSCRIPT_MUL_FACTOR;
-                textFont.SetPointSize(static_cast<int>(size));
+                textFont.SetFractionalPointSize(textFont.GetFractionalPointSize() / wxSCRIPT_MUL_FACTOR);
                 x = rect.x;
                 y = rect.y;
             }
@@ -6878,8 +6877,7 @@ bool wxRichTextPlainText::Draw(wxDC& dc, wxRichTextDrawingContext& context, cons
             }
             else
             {
-                double size = static_cast<double>(textFont.GetPointSize()) / wxSCRIPT_MUL_FACTOR;
-                textFont.SetPointSize(static_cast<int>(size));
+                textFont.SetFractionalPointSize(textFont.GetFractionalPointSize() / wxSCRIPT_MUL_FACTOR);
                 x = rect.x;
                 int sub_height = static_cast<int>(static_cast<double>(charHeight) / wxSCRIPT_MUL_FACTOR);
                 y = rect.y + (rect.height - sub_height + (descent - m_descent));
@@ -7197,8 +7195,7 @@ bool wxRichTextPlainText::GetRangeSize(const wxRichTextRange& range, wxSize& siz
             }
             else
             {
-                double textSize = static_cast<double>(textFont.GetPointSize()) / wxSCRIPT_MUL_FACTOR;
-                textFont.SetPointSize(static_cast<int>(textSize));
+                textFont.SetFractionalPointSize(textFont.GetFractionalPointSize() / wxSCRIPT_MUL_FACTOR);
             }
             wxCheckSetFont(dc, textFont);
             bScript = true;
@@ -7206,7 +7203,7 @@ bool wxRichTextPlainText::GetRangeSize(const wxRichTextRange& range, wxSize& siz
         else if (textAttr.HasTextEffects() && (textAttr.GetTextEffects() & wxTEXT_ATTR_EFFECT_SMALL_CAPITALS))
         {
             wxFont textFont = font;
-            textFont.SetPointSize((int) (textFont.GetPointSize()*0.75));
+            textFont.SetFractionalPointSize(textFont.GetFractionalPointSize()*0.75);
             wxCheckSetFont(dc, textFont);
             bScript = true;
         }
@@ -9264,8 +9261,7 @@ void wxRichTextStdRenderer::SetFontForBullet(wxRichTextBuffer& buffer, wxDC& dc,
             }
             else
             {
-                double size = static_cast<double>(textFont.GetPointSize()) / wxSCRIPT_MUL_FACTOR;
-                textFont.SetPointSize(static_cast<int>(size));
+                textFont.SetFractionalPointSize(textFont.GetFractionalPointSize() / wxSCRIPT_MUL_FACTOR);
             }
             wxCheckSetFont(dc, textFont);
         }
@@ -9278,7 +9274,7 @@ void wxRichTextStdRenderer::SetFontForBullet(wxRichTextBuffer& buffer, wxDC& dc,
             }
             else
             {
-                textFont.SetPointSize((int) (textFont.GetPointSize()*0.75));
+                textFont.SetFractionalPointSize(textFont.GetFractionalPointSize()*0.75);
             }
 
             wxCheckSetFont(dc, textFont);
diff --git a/src/richtext/richtextformatdlg.cpp b/src/richtext/richtextformatdlg.cpp
index 30017cf012..5fd0d7858d 100644
--- a/src/richtext/richtextformatdlg.cpp
+++ b/src/richtext/richtextformatdlg.cpp
@@ -516,8 +516,7 @@ void wxRichTextFontPreviewCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 
     if ((GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT) || (GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT))
     {
-        double fontSize = static_cast<double>(font.GetPointSize()) / wxSCRIPT_MUL_FACTOR;
-        font.SetPointSize( static_cast<int>(fontSize) );
+        font.SetFractionalPointSize(font.GetFractionalPointSize() / wxSCRIPT_MUL_FACTOR);
     }
 
     if ( font.IsOk() )