diff --git a/src/test/run-make/used/Makefile b/src/test/run-make/used/Makefile
index 70ac2e3802b8..650464e4d845 100644
--- a/src/test/run-make/used/Makefile
+++ b/src/test/run-make/used/Makefile
@@ -7,6 +7,6 @@ all:
 else
 all:
 	$(RUSTC) -C opt-level=3 --emit=obj used.rs
-	nm -C used.o | grep FOO
-	nm -C used.o | grep -v BAR
+	nm -C $(TMPDIR)/used.o | grep FOO
+	nm -C $(TMPDIR)/used.o | grep -v BAR
 endif