diff --git a/rust.spec b/rust.spec
index 657c7e6..9e2c6e2 100644
--- a/rust.spec
+++ b/rust.spec
@@ -17,7 +17,7 @@
 # a waste of lookaside cache space when they're most often unused.
 # Run "spectool -g rust.spec" after changing this and then "fedpkg upload" to
 # add them to sources. Remember to remove them again after the bootstrap build!
-#global bootstrap_arches %%{rust_arches}
+%global bootstrap_arches %%{rust_arches}
 
 # Define a space-separated list of targets to ship rust-std-static-$triple for
 # cross-compilation. The packages are noarch, but they're not fully