diff --git a/util/romcc/romcc.c b/util/romcc/romcc.c
index 1a939fb807..b0f6198e5a 100644
--- a/util/romcc/romcc.c
+++ b/util/romcc/romcc.c
@@ -1084,6 +1084,7 @@ struct compile_state {
 	struct hash_entry *i_default;
 	struct hash_entry *i_return;
 	struct hash_entry *i_noreturn;
+	struct hash_entry *i_unused;
 	/* Additional hash entries for predefined macros */
 	struct hash_entry *i_defined;
 	struct hash_entry *i___VA_ARGS__;
@@ -12752,6 +12753,9 @@ static unsigned int attrib(struct compile_state *state, unsigned int attributes)
 		else if (ident == state->i_noreturn) {
 			// attribute((noreturn)) does nothing (yet?)
 		}
+		else if (ident == state->i_unused) {
+			// attribute((unused)) does nothing (yet?)
+		}
 		else {
 			error(state, 0, "Unknown attribute:%s", ident->name);
 		}
@@ -24988,6 +24992,7 @@ static void compile(const char *filename,
 	state.i_noinline      = lookup(&state, "noinline", 8);
 	state.i_always_inline = lookup(&state, "always_inline", 13);
 	state.i_noreturn      = lookup(&state, "noreturn", 8);
+	state.i_unused        = lookup(&state, "unused", 8);
 
 	/* Process the command line macros */
 	process_cmdline_macros(&state);