diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 89ed9b7294d3f..eae99a51106c1 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -467,7 +467,7 @@ pub fn core_macros() -> ~str {
     )
 
     macro_rules! assert_eq (
-        ($given:expr , $expected:expr) => (
+        ($expected:expr , $given:expr) => (
             {
                 let given_val = $given;
                 let expected_val = $expected;
@@ -480,7 +480,7 @@ pub fn core_macros() -> ~str {
     )
 
     macro_rules! assert_approx_eq (
-        ($given:expr , $expected:expr) => (
+        ($expected:expr , $given:expr) => (
             {
                 use std::cmp::ApproxEq;
 
@@ -496,7 +496,7 @@ pub fn core_macros() -> ~str {
                 }
             }
         );
-        ($given:expr , $expected:expr , $epsilon:expr) => (
+        ($expected:expr , $given:expr , $epsilon:expr) => (
             {
                 use std::cmp::ApproxEq;