diff --git a/wxPython/wx/lib/ogl/_lines.py b/wxPython/wx/lib/ogl/_lines.py
index ea4b9ea959..5bfd6bd4e6 100644
--- a/wxPython/wx/lib/ogl/_lines.py
+++ b/wxPython/wx/lib/ogl/_lines.py
@@ -1511,12 +1511,7 @@ class LineShape(Shape):
         labelShape._shapeRegion.SetSize(labelShape.GetWidth(), labelShape.GetHeight())
 
         # Find position in line's region list
-        i = 0
-        for region in self.GetRegions():
-            if labelShape._shapeRegion == region:
-                self.GetRegions().remove(region)
-            else:
-                i += 1
+        i = self._regions.index(labelShape._shapeRegion)
                 
         xx, yy = self.GetLabelPosition(i)
         # Set the region's offset, relative to the default position for