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-rw-r--r--ext/json/json.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/json/json.c b/ext/json/json.c
index 3c20498aa8..c7759ed740 100644
--- a/ext/json/json.c
+++ b/ext/json/json.c
@@ -297,7 +297,7 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
json_pretty_print_indent(buf, options TSRMLS_CC);
- json_escape_string(buf, key, key_len - 1, options TSRMLS_CC);
+ json_escape_string(buf, key, key_len - 1, options & ~PHP_JSON_NUMERIC_CHECK TSRMLS_CC);
smart_str_appendc(buf, ':');
json_pretty_print_char(buf, options, ' ' TSRMLS_CC);