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-rw-r--r--generic/tclStrToD.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclStrToD.c b/generic/tclStrToD.c
index 2f29617..5d2efc7 100644
--- a/generic/tclStrToD.c
+++ b/generic/tclStrToD.c
@@ -5273,7 +5273,7 @@ TclFormatNaN(
*buffer++ = 'N';
bitwhack.iv &= ((UINT64_C(1)) << 51) - 1;
if (bitwhack.iv != 0) {
- sprintf(buffer, "(%" PRIx64 ")", bitwhack.iv);
+ snprintf(buffer, TCL_DOUBLE_SPACE, "(%" PRIx64 ")", bitwhack.iv);
} else {
*buffer = '\0';
}