diff --git a/buildglyphs.ptl b/buildglyphs.ptl
index 66bd184..76509e4 100644
--- a/buildglyphs.ptl
+++ b/buildglyphs.ptl
@@ -512,14 +512,15 @@ export as build : define [buildFont para recursive recursiveCodes] : begin
 	# Note: we use 1000upm in design, and (1000 * upmsacle)upm in production, to avoid rounding error.
 	
 	let [asc : para.leading * CAP / (CAP - DESCENDER)] [desc : para.leading * DESCENDER / (CAP - DESCENDER)] : begin
+		local bottomPad : fallback para.linegap 0
 		set font.head.unitsPerEm        1000
 		set font.hhea.ascender          asc
 		set font.OS_2.usWinAscent       asc
 		set font.OS_2.sTypoAscender     asc
 		
-		set font.hhea.descender         (DESCENDER - para.linegap)
-		set font.OS_2.usWinDescent      ([Math.abs desc] + para.liengap)
-		set font.OS_2.sTypoDescender    (desc - para.liengap)
+		set font.hhea.descender         (DESCENDER - bottomPad)
+		set font.OS_2.usWinDescent      ([Math.abs desc] + bottomPad)
+		set font.OS_2.sTypoDescender    (desc - bottomPad)
 		
 		set font.hhea.lineGap           (para.leading - asc + DESCENDER)
 		set font.OS_2.sTypoLineGap      (para.leading - asc + desc)