diff --git a/json-lexer.c b/json-lexer.c
index 9d649205a7..0b145d125c 100644
--- a/json-lexer.c
+++ b/json-lexer.c
@@ -275,6 +275,7 @@ void json_lexer_init(JSONLexer *lexer, JSONLexerEmitter func)
     lexer->emit = func;
     lexer->state = IN_START;
     lexer->token = qstring_new();
+    lexer->x = lexer->y = 0;
 }
 
 static int json_lexer_feed_char(JSONLexer *lexer, char ch)