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-rw-r--r--src/libsystemd-network/dhcp6-option.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
index 076bb2dac0..0f46df6a1b 100644
--- a/src/libsystemd-network/dhcp6-option.c
+++ b/src/libsystemd-network/dhcp6-option.c
@@ -344,7 +344,7 @@ int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char *
int r;
assert_return(optlen > 1, -ENODATA);
- assert_return(optval[optlen] == '\0', -EINVAL);
+ assert_return(optval[optlen - 1] == '\0', -EINVAL);
while (pos < optlen) {
_cleanup_free_ char *ret = NULL;