diff --git a/Lib/fontTools/ttLib/ttGlyphSet.py b/Lib/fontTools/ttLib/ttGlyphSet.py
index c729f85ee..27903c245 100644
--- a/Lib/fontTools/ttLib/ttGlyphSet.py
+++ b/Lib/fontTools/ttLib/ttGlyphSet.py
@@ -205,13 +205,14 @@ class _TTVarGlyphCFF(_TTVarGlyph):
 		self._glyph.draw(pen, blender)
 
 		self.width = self._ttFont['hmtx'][self._glyphName][0]
-		hvar = self._ttFont['HVAR'].table
-		varidx = self._ttFont.getGlyphID(self._glyphName)
-		if hvar.AdvWidthMap is not None:
-			varidx = hvar.AdvWidthMap.mapping[self._glyphName]
-		vsInstancer = VarStoreInstancer(hvar.VarStore, self._ttFont['fvar'].axes, self._location)
-		delta = vsInstancer[varidx]
-		self.width += otRound(delta)
+		if 'HVAR' in self._ttFont:
+			hvar = self._ttFont['HVAR'].table
+			varidx = self._ttFont.getGlyphID(self._glyphName)
+			if hvar.AdvWidthMap is not None:
+				varidx = hvar.AdvWidthMap.mapping[self._glyphName]
+			vsInstancer = VarStoreInstancer(hvar.VarStore, self._ttFont['fvar'].axes, self._location)
+			delta = vsInstancer[varidx]
+			self.width += otRound(delta)
 
 
 class _TTVarGlyphGlyf(_TTVarGlyph):