diff --git a/gui/attribute_gauge.py b/gui/attribute_gauge.py
index 141db410f..08e1e1cb8 100644
--- a/gui/attribute_gauge.py
+++ b/gui/attribute_gauge.py
@@ -212,7 +212,7 @@ class AttributeGauge(wx.Window):
             for x in range(1, 20):
                 dc.SetBrush(wx.Brush(wx.LIGHT_GREY))
                 dc.SetPen(wx.Pen(wx.LIGHT_GREY))
-                dc.DrawRectangle(round(x * 10), 1, 1, rect.height)
+                dc.DrawRectangle(round(x * 10), 1, 1, round(rect.height))
 
         dc.SetBrush(wx.Brush(colour))
         dc.SetPen(wx.Pen(colour))
@@ -222,19 +222,19 @@ class AttributeGauge(wx.Window):
 
         if value >= 0:
             padding = (half if is_even else math.ceil(half - 1)) + 1
-            dc.DrawRectangle(round(padding), 1, w, rect.height)
+            dc.DrawRectangle(round(padding), 1, round(w), round(rect.height))
         else:
             padding = half - w + 1 if is_even else math.ceil(half) - (w - 1)
-            dc.DrawRectangle(round(padding), 1, w, rect.height)
+            dc.DrawRectangle(round(padding), 1, round(w), round(rect.height))
 
         if self.leading_edge and (self.edge_on_neutral or value != 0):
             dc.SetPen(wx.Pen(wx.WHITE))
             dc.SetBrush(wx.Brush(wx.WHITE))
 
             if value > 0:
-                dc.DrawRectangle(round(min(padding + w, rect.width)), 1, 1, rect.height)
+                dc.DrawRectangle(round(min(padding + w, rect.width)), 1, 1, round(rect.height))
             else:
-                dc.DrawRectangle(round(max(padding - 1, 1)), 1, 1, rect.height)
+                dc.DrawRectangle(round(max(padding - 1, 1)), 1, 1, round(rect.height))
 
     def OnTimer(self, event):
         old_value = self._old_percentage
diff --git a/gui/builtinShipBrowser/pfBitmapFrame.py b/gui/builtinShipBrowser/pfBitmapFrame.py
index 20755c1f4..fbf31dced 100644
--- a/gui/builtinShipBrowser/pfBitmapFrame.py
+++ b/gui/builtinShipBrowser/pfBitmapFrame.py
@@ -63,4 +63,4 @@ class PFBitmapFrame(wx.Frame):
         mdc.DrawBitmap(self.bitmap, 0, 0)
         mdc.SetPen(wx.Pen("#000000", width=1))
         mdc.SetBrush(wx.TRANSPARENT_BRUSH)
-        mdc.DrawRectangle(0, 0, rect.width, rect.height)
+        mdc.DrawRectangle(0, 0, round(rect.width), round(rect.height))
diff --git a/gui/builtinViews/fittingView.py b/gui/builtinViews/fittingView.py
index c08c0d136..62903a2d6 100644
--- a/gui/builtinViews/fittingView.py
+++ b/gui/builtinViews/fittingView.py
@@ -956,7 +956,7 @@ class FittingView(d.Display):
             cx = padding
 
             if slotMap[st.slot]:
-                mdc.DrawRectangle(round(cx), round(cy), maxWidth - cx, maxRowHeight)
+                mdc.DrawRectangle(round(cx), round(cy), round(maxWidth - cx), round(maxRowHeight))
 
             for i, col in enumerate(self.activeColumns):
                 if i > maxColumns:
diff --git a/gui/chrome_tabs.py b/gui/chrome_tabs.py
index 7754554da..3b4cde2db 100644
--- a/gui/chrome_tabs.py
+++ b/gui/chrome_tabs.py
@@ -1514,7 +1514,7 @@ class PFNotebookPagePreview(wx.Frame):
         x, y = mdc.GetTextExtent(self.title)
 
         mdc.SetBrush(wx.Brush(wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOWTEXT)))
-        mdc.DrawRectangle(0, 0, rect.width, 16)
+        mdc.DrawRectangle(0, 0, round(rect.width), 16)
 
         mdc.SetTextForeground(wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOW))
 
@@ -1523,4 +1523,4 @@ class PFNotebookPagePreview(wx.Frame):
         mdc.SetPen(wx.Pen("#000000", width=1))
         mdc.SetBrush(wx.TRANSPARENT_BRUSH)
 
-        mdc.DrawRectangle(0, 16, rect.width, rect.height - 16)
+        mdc.DrawRectangle(0, 16, round(rect.width), round(rect.height - 16))
diff --git a/gui/utils/anim.py b/gui/utils/anim.py
index ede580d51..e2042be3a 100644
--- a/gui/utils/anim.py
+++ b/gui/utils/anim.py
@@ -80,7 +80,7 @@ class LoadAnimation(wx.Window):
                 bh = rect.height
                 y = 0
 
-            dc.DrawRectangle(round(x), round(y), barWidth, bh)
+            dc.DrawRectangle(round(x), round(y), round(barWidth), round(bh))
             x += barWidth
 
         textColor = wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOWTEXT)