diff --git a/ext/json/ext/parser/parser.c b/ext/json/ext/parser/parser.c
index b3b6bfdca..52b6e2250 100644
--- a/ext/json/ext/parser/parser.c
+++ b/ext/json/ext/parser/parser.c
@@ -753,7 +753,7 @@ static const signed char digit_values[256] = {
 static uint32_t unescape_unicode(JSON_ParserState *state, const char *sp, const char *spe)
 {
     if (RB_UNLIKELY(sp > spe - 4)) {
-        raise_eos_error_at("incomplete unicode character escape sequence at %s", state, sp - 2);
+        raise_syntax_error_at("incomplete unicode character escape sequence at %s", state, sp - 2);
     }
 
     const unsigned char *p = (const unsigned char *)sp;
diff --git a/test/json/resumable_parser_test.rb b/test/json/resumable_parser_test.rb
index a704e9edd..dbf3ea7b6 100644
--- a/test/json/resumable_parser_test.rb
+++ b/test/json/resumable_parser_test.rb
@@ -179,6 +179,12 @@ def test_parse_byte_by_byte_string
     assert_resumed_parsing('"te\\u2028st"')
     assert_resumed_parsing(JSON.generate("te\u2028st"))
     assert_resumed_parsing(JSON.generate("te \u2028 st"))
+
+    parser = JSON::ResumableParser.new
+    parser << '"\u12"'
+    assert_raise JSON::ParserError do
+      parser.parse
+    end
   end
 
   def test_parse_byte_by_byte_numbers