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-rw-r--r--src/libstd/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 4f6d170560c..8de6e1a24f1 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -321,6 +321,7 @@
 #![feature(zero_one)]
 #![cfg_attr(test, feature(update_panic_count))]
 #![cfg_attr(stage0, feature(pub_restricted))]
+#![cfg_attr(test, feature(float_bits_conv))]
 
 // Explicitly import the prelude. The compiler uses this same unstable attribute
 // to import the prelude implicitly when building crates that depend on std.