diff --git a/Lib/fontTools/ttLib/tables/otConverters.py b/Lib/fontTools/ttLib/tables/otConverters.py
index 7f5970aa4..cc7ec24d1 100644
--- a/Lib/fontTools/ttLib/tables/otConverters.py
+++ b/Lib/fontTools/ttLib/tables/otConverters.py
@@ -330,7 +330,6 @@ converterMapping = {
 	# type         class
 	"int16":       Short,
 	"uint16":      UShort,
-	"ULONG":       Long,
 	"Fixed":       Fixed,
 	"Tag":         Tag,
 	"GlyphID":     GlyphID,