diff --git a/changes/3.1.0.md b/changes/3.1.0.md
new file mode 100644
index 0000000000..e52ec029cf
--- /dev/null
+++ b/changes/3.1.0.md
@@ -0,0 +1 @@
+ * Add Pitman duodecimal digits (#483).
\ No newline at end of file
diff --git a/glyphs/numbers.ptl b/glyphs/numbers.ptl
index 88305d8750..03c73199a8 100644
--- a/glyphs/numbers.ptl
+++ b/glyphs/numbers.ptl
@@ -144,6 +144,7 @@ glyph-block Numbers : begin
 		include : TwoShape XH
 		save 'two.onum'
 
+	turned nothing 0x218A 'two.lnum' MIDDLE (CAP / 2)
 
 	define [ThreeShape top] : glyph-construction
 		local barcenter : top * BARPOS
@@ -187,6 +188,7 @@ glyph-block Numbers : begin
 	select-variant 'three.lnum' '3' (follow -- 'three')
 	select-variant 'three.onum' (follow -- 'three')
 
+	turned nothing 0x218B 'three.lnum' MIDDLE (CAP / 2)
 
 	define [FourShape top] : glyph-construction
 		local bar (top * 0.4)