diff --git a/src/mat2.rs b/src/mat2.rs
index 64d5506..b3c099a 100644
--- a/src/mat2.rs
+++ b/src/mat2.rs
@@ -210,7 +210,7 @@ pub impl<T:Copy Float> Mat2<T>: MutableMatrix<T, Vec2<T>> {
         match i {
             0 => &mut self.x,
             1 => &mut self.y,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 1, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 1, but found %u", i))
         }
     }
     
@@ -263,7 +263,7 @@ pub impl<T:Copy Float> Mat2<T>: MutableMatrix<T, Vec2<T>> {
     fn invert_self(&mut self) {
         match self.inverse() {
             Some(m) => (*self) = m,
-            None => fail(~"Couldn't invert the matrix!")
+            None => fail!(~"Couldn't invert the matrix!")
         }
     }
     
diff --git a/src/mat3.rs b/src/mat3.rs
index f7cb897..6f0b9ba 100644
--- a/src/mat3.rs
+++ b/src/mat3.rs
@@ -477,7 +477,7 @@ pub impl<T:Copy Float> Mat3<T>: MutableMatrix<T, Vec3<T>> {
             0 => &mut self.x,
             1 => &mut self.y,
             2 => &mut self.z,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 2, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 2, but found %u", i))
         }
     }
     
@@ -534,7 +534,7 @@ pub impl<T:Copy Float> Mat3<T>: MutableMatrix<T, Vec3<T>> {
     fn invert_self(&mut self) {
         match self.inverse() {
             Some(m) => (*self) = m,
-            None => fail(~"Couldn't invert the matrix!")
+            None => fail!(~"Couldn't invert the matrix!")
         }
     }
     
diff --git a/src/mat4.rs b/src/mat4.rs
index 1f7b6a3..e587009 100644
--- a/src/mat4.rs
+++ b/src/mat4.rs
@@ -403,7 +403,7 @@ pub impl<T:Copy Float> Mat4<T>: MutableMatrix<T, Vec4<T>> {
             1 => &mut self.y,
             2 => &mut self.z,
             3 => &mut self.w,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 3, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 3, but found %u", i))
         }
     }
     
@@ -464,7 +464,7 @@ pub impl<T:Copy Float> Mat4<T>: MutableMatrix<T, Vec4<T>> {
     fn invert_self(&mut self) {
         match self.inverse() {
             Some(m) => (*self) = m,
-            None => fail(~"Couldn't invert the matrix!")
+            None => fail!(~"Couldn't invert the matrix!")
         }
     }
     
diff --git a/src/quat.rs b/src/quat.rs
index dcc5b4e..640bb34 100644
--- a/src/quat.rs
+++ b/src/quat.rs
@@ -138,7 +138,7 @@ pub impl<T:Copy Float> Quat<T> {
     }
     
     pure fn get_angle_axis(&self) -> (T, Vec3<T>) {
-        fail(~"Not yet implemented.")
+        fail!(~"Not yet implemented.")
     }
     
     #[inline(always)]
diff --git a/src/test/performance/vector_index_operator.rs b/src/test/performance/vector_index_operator.rs
index 2d98bcb..023a671 100644
--- a/src/test/performance/vector_index_operator.rs
+++ b/src/test/performance/vector_index_operator.rs
@@ -21,7 +21,7 @@ pub impl VecMatch: Index<uint, float> {
             1 => self.y,
             2 => self.z,
             3 => self.w,
-            _ => fail(~"Vector index out of bounds.")
+            _ => fail!(~"Vector index out of bounds.")
         }
     }
 }
diff --git a/src/vec2.rs b/src/vec2.rs
index 5b4c03b..de53dd2 100644
--- a/src/vec2.rs
+++ b/src/vec2.rs
@@ -78,7 +78,7 @@ pub impl<T:Copy> Vec2<T>: MutableVector<T> {
         match i {
             0 => &mut self.x,
             1 => &mut self.y,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 1, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 1, but found %u", i))
         }
     }
     
diff --git a/src/vec3.rs b/src/vec3.rs
index 7cab425..7caf032 100644
--- a/src/vec3.rs
+++ b/src/vec3.rs
@@ -81,7 +81,7 @@ pub impl<T:Copy> Vec3<T>: MutableVector<T> {
             0 => &mut self.x,
             1 => &mut self.y,
             2 => &mut self.z,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 2, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 2, but found %u", i))
         }
     }
     
diff --git a/src/vec4.rs b/src/vec4.rs
index c871825..9670c6c 100644
--- a/src/vec4.rs
+++ b/src/vec4.rs
@@ -80,7 +80,7 @@ pub impl<T:Copy> Vec4<T>: MutableVector<T> {
             1 => &mut self.y,
             2 => &mut self.z,
             3 => &mut self.w,
-            _ => fail(fmt!("index out of bounds: expected an index from 0 to 3, but found %u", i))
+            _ => fail!(fmt!("index out of bounds: expected an index from 0 to 3, but found %u", i))
         }
     }