diff --git a/serde2/serde2_macros/src/lib.rs b/serde2/serde2_macros/src/lib.rs
index 1803ad6f..0db85d69 100644
--- a/serde2/serde2_macros/src/lib.rs
+++ b/serde2/serde2_macros/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(plugin, plugin_registrar, rustc_private, unboxed_closures)]
+#![feature(custom_derive, plugin, plugin_registrar, rustc_private, unboxed_closures)]
 #![plugin(quasi_macros)]
 
 extern crate aster;
diff --git a/serde2/tests/test_de.rs b/serde2/tests/test_de.rs
index 63efdcf2..8f35c869 100644
--- a/serde2/tests/test_de.rs
+++ b/serde2/tests/test_de.rs
@@ -1,4 +1,4 @@
-#![feature(plugin, test)]
+#![feature(custom_derive, plugin, test)]
 #![plugin(serde2_macros)]
 
 extern crate test;
diff --git a/serde2/tests/test_json.rs b/serde2/tests/test_json.rs
index 7c31414a..7a2f9d63 100644
--- a/serde2/tests/test_json.rs
+++ b/serde2/tests/test_json.rs
@@ -1,4 +1,4 @@
-#![feature(plugin, test)]
+#![feature(custom_derive, plugin, test)]
 #![plugin(serde2_macros)]
 
 extern crate test;
diff --git a/serde2/tests/test_macros.rs b/serde2/tests/test_macros.rs
index bea8fdea..2ff1d8ee 100644
--- a/serde2/tests/test_macros.rs
+++ b/serde2/tests/test_macros.rs
@@ -1,4 +1,4 @@
-#![feature(plugin)]
+#![feature(custom_derive, plugin)]
 #![plugin(serde2_macros)]
 
 extern crate serde2;
diff --git a/serde2/tests/test_ser.rs b/serde2/tests/test_ser.rs
index 4a27faeb..ea174515 100644
--- a/serde2/tests/test_ser.rs
+++ b/serde2/tests/test_ser.rs
@@ -1,4 +1,4 @@
-#![feature(plugin, test)]
+#![feature(custom_derive, plugin, test)]
 #![plugin(serde2_macros)]
 
 extern crate test;