diff --git a/src/lib/util/dict_tokenize.c b/src/lib/util/dict_tokenize.c
index d215cde02bdc..b777ed29034a 100644
--- a/src/lib/util/dict_tokenize.c
+++ b/src/lib/util/dict_tokenize.c
@@ -603,13 +603,13 @@ static int dict_process_flag_field(dict_tokenize_ctx_t *ctx, char *name, fr_dict
 		}
 
 		/*
-		 *	Search in the main flags table
-		 *	then the protocol flags table.
+		 *	Search the protocol table, then the main table.
+		 *	This allows protocols to overload common flags.
 		 */
-		if (!fr_dict_attr_flag_to_parser(&parser, dict_common_flags, dict_common_flags_len, key, NULL) &&
-		    (!ctx->dict->proto->attr.flags.table ||
-		     !fr_dict_attr_flag_to_parser(&parser, ctx->dict->proto->attr.flags.table,
-						  ctx->dict->proto->attr.flags.table_len, key, NULL))) {
+		if (!((ctx->dict->proto->attr.flags.table &&
+		       fr_dict_attr_flag_to_parser(&parser, ctx->dict->proto->attr.flags.table,
+						   ctx->dict->proto->attr.flags.table_len, key, NULL)) ||
+		       fr_dict_attr_flag_to_parser(&parser, dict_common_flags, dict_common_flags_len, key, NULL))) {
 			fr_strerror_printf("Unknown flag '%s'", key);
 			return -1;
 		}