diff --git a/src/cargo/cargo.rc b/src/cargo/cargo.rc
index 2ed264719c2..a23b6a2ff51 100644
--- a/src/cargo/cargo.rc
+++ b/src/cargo/cargo.rc
@@ -19,6 +19,8 @@
 
 #[no_core];
 
+#[warn(no_non_implicitly_copyable_typarams,no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 use rustc(vers = "0.2");
diff --git a/src/cargo/cargo.rs b/src/cargo/cargo.rs
index e6b89ce786b..eee76f24ec2 100644
--- a/src/cargo/cargo.rs
+++ b/src/cargo/cargo.rs
@@ -1,7 +1,5 @@
 // cargo.rs - Rust package manager
 
-#[warn(no_non_implicitly_copyable_typarams)];
-
 import syntax::{ast, codemap};
 import syntax::parse;
 import rustc::metadata::filesearch::{get_cargo_root, get_cargo_root_nearest,
diff --git a/src/compiletest/compiletest.rc b/src/compiletest/compiletest.rc
index ba04952df5d..d4c4cb482e0 100644
--- a/src/compiletest/compiletest.rc
+++ b/src/compiletest/compiletest.rc
@@ -2,6 +2,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 
diff --git a/src/fuzzer/fuzzer.rc b/src/fuzzer/fuzzer.rc
index c04fa0d2f39..1a5630b0e2f 100644
--- a/src/fuzzer/fuzzer.rc
+++ b/src/fuzzer/fuzzer.rc
@@ -4,6 +4,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 use syntax(vers = "0.2");
diff --git a/src/libcore/core.rc b/src/libcore/core.rc
index 6aa24b9b651..84cebcceccd 100644
--- a/src/libcore/core.rc
+++ b/src/libcore/core.rc
@@ -31,6 +31,8 @@ This behavior can be disabled with the `#[no_core]` crate attribute.
 // Don't link to core. We are core.
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 export int, i8, i16, i32, i64;
 export uint, u8, u16, u32, u64;
 export float, f32, f64;
diff --git a/src/libstd/std.rc b/src/libstd/std.rc
index 7558f57a46c..8d2e0732833 100644
--- a/src/libstd/std.rc
+++ b/src/libstd/std.rc
@@ -10,6 +10,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 import core::*;
 
diff --git a/src/libsyntax/syntax.rc b/src/libsyntax/syntax.rc
index 8284138c675..53e21e4214c 100644
--- a/src/libsyntax/syntax.rc
+++ b/src/libsyntax/syntax.rc
@@ -8,6 +8,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 
diff --git a/src/rustc/driver/rustc.rs b/src/rustc/driver/rustc.rs
index 5be463ee7a9..db185215bea 100644
--- a/src/rustc/driver/rustc.rs
+++ b/src/rustc/driver/rustc.rs
@@ -1,4 +1,5 @@
 #[no_core];
+#[warn(no_vecs_not_implicitly_copyable)];
 
 use core(vers = "0.2");
 use std(vers = "0.2");
diff --git a/src/rustc/rustc.rc b/src/rustc/rustc.rc
index 6a4d447af23..7cdaeb9273b 100644
--- a/src/rustc/rustc.rc
+++ b/src/rustc/rustc.rc
@@ -11,6 +11,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 use syntax(vers = "0.2");
diff --git a/src/rustdoc/rustdoc.rc b/src/rustdoc/rustdoc.rc
index b7fc9de5994..8e6dc2e6ccf 100644
--- a/src/rustdoc/rustdoc.rc
+++ b/src/rustdoc/rustdoc.rc
@@ -11,6 +11,8 @@
 
 #[no_core];
 
+#[warn(no_vecs_not_implicitly_copyable)];
+
 use core(vers = "0.2");
 use std(vers = "0.2");
 use rustc(vers = "0.2");