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-rw-r--r--ext/json/parser/parser.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
index 907bd0477b..de72edf4e7 100644
--- a/ext/json/parser/parser.c
+++ b/ext/json/parser/parser.c
@@ -630,7 +630,7 @@ static VALUE json_string_unescape(JSON_ParserState *state, const char *string, c
unescape = (char *) "\f";
break;
case 'u':
- if (pe > stringEnd - 4) {
+ if (pe > stringEnd - 5) {
raise_parse_error("incomplete unicode character escape sequence at '%s'", p);
} else {
uint32_t ch = unescape_unicode((unsigned char *) ++pe);