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-rw-r--r--lib/pure/streams.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/pure/streams.nim b/lib/pure/streams.nim
index e6004b5d0..50b5c219a 100644
--- a/lib/pure/streams.nim
+++ b/lib/pure/streams.nim
@@ -279,7 +279,7 @@ proc ssAtEnd(s: Stream): bool =
 
 proc ssSetPosition(s: Stream, pos: int) =
   var s = StringStream(s)
-  s.pos = clamp(pos, 0, s.data.high)
+  s.pos = clamp(pos, 0, s.data.len)
 
 proc ssGetPosition(s: Stream): int =
   var s = StringStream(s)