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-rw-r--r--lib/pure/strutils.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/pure/strutils.nim b/lib/pure/strutils.nim
index 834e7db6a..2f2b89955 100644
--- a/lib/pure/strutils.nim
+++ b/lib/pure/strutils.nim
@@ -887,7 +887,7 @@ proc toHex*(x: BiggestInt, len: Positive): string {.noSideEffect,
     n = x
   result = newString(len)
   for j in countdown(len-1, 0):
-    result[j] = HexChars[n and 0xF]
+    result[j] = HexChars[(n and 0xF).int]
     n = n shr 4
     # handle negative overflow
     if n == 0 and x < 0: n = -1