diff --git a/examples/helloworld.rs b/examples/helloworld.rs
index 779325ff9..e6dff241a 100644
--- a/examples/helloworld.rs
+++ b/examples/helloworld.rs
@@ -18,13 +18,13 @@ fn main() {
 
     println!("Element-wise arithmetic");
     let  b = sin(&a)
-        .and_then(|x| add(x, 1.5))
+        .and_then(|x| add(&x, &1.5))
         .unwrap();
 
     let b2 = sin(&a).
         and_then(|x| {
             cos(&a)
-                .and_then(|y| add(x, y))
+                .and_then(|y| add(&x, &y))
         })
         .unwrap();
 
diff --git a/examples/histogram.rs b/examples/histogram.rs
index da07773bb..0984740d5 100644
--- a/examples/histogram.rs
+++ b/examples/histogram.rs
@@ -33,7 +33,7 @@ fn main() {
 
     let disp_img = man.dims()
         .and_then(|x| constant(255 as f32, x))
-        .and_then(|x| div(man, x))
+        .and_then(|x| div(&man, &x))
         .unwrap();
 
     loop {
diff --git a/examples/pi.rs b/examples/pi.rs
index d4750d1e6..1fb4ef520 100644
--- a/examples/pi.rs
+++ b/examples/pi.rs
@@ -18,9 +18,9 @@ fn main() {
     let start = PreciseTime::now();
 
     for bench_iter in 0..100 {
-        let pi_val = add(x*x, y*y)
+        let pi_val = add(&mul(x, x).unwrap(), &mul(y, y).unwrap())
             .and_then( |z| sqrt(&z) )
-            .and_then( |z| le(z, constant(1, dims).unwrap()) )
+            .and_then( |z| le(&z, &constant(1, dims).unwrap()) )
             .and_then( |z| sum_all(&z) )
             .map( |z| z.0 * 4.0/(samples as  f64) )
             .unwrap();
diff --git a/src/arith/mod.rs b/src/arith/mod.rs
index e2e792e61..5c085d6a5 100644
--- a/src/arith/mod.rs
+++ b/src/arith/mod.rs
@@ -236,7 +236,7 @@ macro_rules! overloaded_binary_func {
             }
         }
 
-        pub fn $fn_name<T: Convertable, U: Convertable> (arg1: T, arg2: U) -> Result<Array, AfError> {
+        pub fn $fn_name<T: Convertable, U: Convertable> (arg1: &T, arg2: &U) -> Result<Array, AfError> {
             let lhs = arg1.convert();
             let rhs = arg2.convert();
             match (lhs.is_scalar().unwrap(), rhs.is_scalar().unwrap()) {