diff --git a/ext/psych/yaml/scanner.c b/ext/psych/yaml/scanner.c
index 3ef90dc66b..597281ec64 100644
--- a/ext/psych/yaml/scanner.c
+++ b/ext/psych/yaml/scanner.c
@@ -1186,11 +1186,9 @@ yaml_parser_increase_flow_level(yaml_parser_t *parser)
 static int
 yaml_parser_decrease_flow_level(yaml_parser_t *parser)
 {
-    yaml_simple_key_t dummy_key;    /* Used to eliminate a compiler warning. */
-
     if (parser->flow_level) {
         parser->flow_level --;
-        dummy_key = POP(parser, parser->simple_keys);
+	(void)POP(parser, parser->simple_keys);
     }
 
     return 1;