diff --git a/src/Makefile b/src/Makefile
index a407f2066bef..4b44925472a5 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -473,6 +473,7 @@ TEST_XFAILS_RUSTC := $(addprefix test/run-pass/, \
                         pred.rs \
                         preempt.rs \
                         rt-circular-buffer.rs \
+                        size-and-align.rs \
                         spawn-fn.rs \
                         spawn-module-qualified.rs \
                         spawn.rs \