--- a/abbrev.stc	Mon Feb 06 15:38:39 2017 +0100
+++ b/abbrev.stc	Mon Feb 06 15:38:43 2017 +0100
@@ -355,7 +355,6 @@
 SignedLongIntegerArray SignedLongIntegerArray stx:libbasic 'Collections-Arrayed' 0
 SignedWordArray SignedWordArray stx:libbasic 'Collections-Arrayed' 0
 Symbol Symbol stx:libbasic 'Collections-Text' 0
-UnboundedExternalStream UnboundedExternalStream stx:libbasic 'Streams-External' 0
 Unicode16String Unicode16String stx:libbasic 'Collections-Text' 0
 UnorderedNumbersError UnorderedNumbersError stx:libbasic 'Kernel-Exceptions-Errors' 1
 WordArray WordArray stx:libbasic 'Collections-Arrayed' 0