diff --git a/src/cmd/8l/asm.c b/src/cmd/8l/asm.c
index 76ebdb9135..a00174c368 100644
--- a/src/cmd/8l/asm.c
+++ b/src/cmd/8l/asm.c
@@ -104,6 +104,9 @@ lookuprel(void)
 void
 adddynrela(Sym *rela, Sym *s, Reloc *r)
 {
+	USED(rela);
+	USED(s);
+	USED(r);
 	sysfatal("adddynrela not implemented");
 }