diff --git a/src/libcore/core.rc b/src/libcore/core.rc
index 5c05c83e35aa..127d6dbc7743 100644
--- a/src/libcore/core.rc
+++ b/src/libcore/core.rc
@@ -164,7 +164,6 @@ pub mod nil;
 pub mod bool;
 pub mod char;
 pub mod tuple;
-pub mod simd;
 
 pub mod vec;
 pub mod at_vec;
diff --git a/src/libcore/unstable.rs b/src/libcore/unstable.rs
index 4a69de26f6b1..0b96e649178a 100644
--- a/src/libcore/unstable.rs
+++ b/src/libcore/unstable.rs
@@ -30,6 +30,8 @@ pub mod weak_task;
 pub mod exchange_alloc;
 #[path = "unstable/intrinsics.rs"]
 pub mod intrinsics;
+#[path = "unstable/simd.rs"]
+pub mod simd;
 #[path = "unstable/extfmt.rs"]
 pub mod extfmt;
 #[path = "unstable/lang.rs"]
diff --git a/src/libcore/simd.rs b/src/libcore/unstable/simd.rs
similarity index 100%
rename from src/libcore/simd.rs
rename to src/libcore/unstable/simd.rs