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-rw-r--r--src/util/casefold.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/util/casefold.c b/src/util/casefold.c
index d3ebd4b..94860b8 100644
--- a/src/util/casefold.c
+++ b/src/util/casefold.c
@@ -300,7 +300,7 @@ int main(int argc, char **argv)
encode_utf8(buffer, codepoint);
if (msg_verbose)
vstream_printf("U+%X -> %s\n", codepoint, STR(buffer));
- if (valid_utf8_string(STR(buffer), LEN(buffer)) == 0)
+ if (valid_utf8_stringz(STR(buffer)) == 0)
msg_fatal("bad utf-8 encoding for U+%X\n", codepoint);
casefold(dest, STR(buffer));
}