diff --git a/glyphs/latin-basic-capital.patel b/glyphs/latin-basic-capital.patel
index dda67fd..a3f4545 100644
--- a/glyphs/latin-basic-capital.patel
+++ b/glyphs/latin-basic-capital.patel
@@ -278,6 +278,7 @@ create-glyph 'C' : glyph-construction
 	include : CShape CAP 0
 
 define [GShape top sma smb] : glyph-construction
+	local ybar : top * 0.52 + STROKE * 0.25
 	include : spiro
 		widths.lhs
 		g4   RIGHTSB (top - HOOK)
@@ -288,11 +289,11 @@ define [GShape top sma smb] : glyph-construction
 		g4   (MIDDLE + CORRECTION_OMIDS) O
 		archv
 		flat RIGHTSB sma
-		curl RIGHTSB (top / 2 + STROKE / 2) [heading UPWARD]
+		curl RIGHTSB ybar [heading UPWARD]
 	include : create-stroke
-		:.start-from  MIDDLE (top / 2 + STROKE / 2)
+		:.start-from  MIDDLE ybar
 		:.set-width   0 STROKE
-		:.line-to     RIGHTSB (top / 2 + STROKE / 2)
+		:.line-to     RIGHTSB ybar
 		:.heads-to    RIGHTWARD
 
 create-glyph 'G' : glyph-construction