diff --git a/parser.c b/parser.c
index bc49073..681207c 100644
--- a/parser.c
+++ b/parser.c
@@ -1091,7 +1091,7 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
             } else {
                 ast_binary *eq = ast_binary_new(ctx, INSTR_EQ_F, exprs[0], exprs[1]);
 
-                eq->refs = false; /* references nothing */
+                eq->refs = (ast_binary_ref)false; /* references nothing */
 
                     /* if (lt) { */
                 out = (ast_expression*)ast_ternary_new(ctx,