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-rw-r--r--src/libfmt_macros/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libfmt_macros/lib.rs b/src/libfmt_macros/lib.rs
index 47cc072a636..a703bfbb8fe 100644
--- a/src/libfmt_macros/lib.rs
+++ b/src/libfmt_macros/lib.rs
@@ -16,6 +16,7 @@
 
 #![crate_name = "fmt_macros"]
 #![experimental]
+#![staged_api]
 #![crate_type = "rlib"]
 #![crate_type = "dylib"]
 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",