diff --git a/engine/parser.c b/engine/parser.c
index 6530980..769f8c0 100644
--- a/engine/parser.c
+++ b/engine/parser.c
@@ -53,7 +53,7 @@ static const ph7_expr_op aOpTable[] = {
 	{ {"(void)",     sizeof("(void)") - 1  }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_VOID },
 	/* Binary operators */
 	/* Precedence 7,left-associative */
-	{ {"instanceof", sizeof("instanceof") - 1}, EXPR_OP_IS, 7, EXPR_OP_NON_ASSOC, PH7_OP_IS},
+	{ {"is", sizeof("is") - 1}, EXPR_OP_IS, 7, EXPR_OP_NON_ASSOC, PH7_OP_IS},
 	{ {"*", sizeof(char)}, EXPR_OP_MUL, 7, EXPR_OP_ASSOC_LEFT, PH7_OP_MUL},
 	{ {"/", sizeof(char)}, EXPR_OP_DIV, 7, EXPR_OP_ASSOC_LEFT, PH7_OP_DIV},
 	{ {"%", sizeof(char)}, EXPR_OP_MOD, 7, EXPR_OP_ASSOC_LEFT, PH7_OP_MOD},