diff --git a/src/arithmetic/fields/fp.rs b/src/arithmetic/fields/fp.rs
index 1b99f04..ad74f66 100644
--- a/src/arithmetic/fields/fp.rs
+++ b/src/arithmetic/fields/fp.rs
@@ -2,7 +2,7 @@ use super::{Field, Group};
 
 use core::convert::TryInto;
 use core::fmt;
-use core::ops::{Add, AddAssign, Mul, MulAssign, Neg, Sub, SubAssign};
+use core::ops::{Add, Mul, Neg, Sub};
 
 use subtle::{Choice, ConditionallySelectable, ConstantTimeEq, CtOption};
 
diff --git a/src/arithmetic/fields/fq.rs b/src/arithmetic/fields/fq.rs
index 11026de..25ec53a 100644
--- a/src/arithmetic/fields/fq.rs
+++ b/src/arithmetic/fields/fq.rs
@@ -2,7 +2,7 @@ use super::{Field, Group};
 
 use core::convert::TryInto;
 use core::fmt;
-use core::ops::{Add, AddAssign, Mul, MulAssign, Neg, Sub, SubAssign};
+use core::ops::{Add, Mul, Neg, Sub};
 
 use subtle::{Choice, ConditionallySelectable, ConstantTimeEq, CtOption};
 
diff --git a/src/arithmetic/macros.rs b/src/arithmetic/macros.rs
index 8145c99..81e1bf6 100644
--- a/src/arithmetic/macros.rs
+++ b/src/arithmetic/macros.rs
@@ -1,6 +1,6 @@
 macro_rules! impl_add_binop_specify_output {
     ($lhs:ident, $rhs:ident, $output:ident) => {
-        impl<'b> Add<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::Add<&'b $rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -9,7 +9,7 @@ macro_rules! impl_add_binop_specify_output {
             }
         }
 
-        impl<'a> Add<$rhs> for &'a $lhs {
+        impl<'a> ::core::ops::Add<$rhs> for &'a $lhs {
             type Output = $output;
 
             #[inline]
@@ -18,7 +18,7 @@ macro_rules! impl_add_binop_specify_output {
             }
         }
 
-        impl Add<$rhs> for $lhs {
+        impl ::core::ops::Add<$rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -31,7 +31,7 @@ macro_rules! impl_add_binop_specify_output {
 
 macro_rules! impl_sub_binop_specify_output {
     ($lhs:ident, $rhs:ident, $output:ident) => {
-        impl<'b> Sub<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::Sub<&'b $rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -40,7 +40,7 @@ macro_rules! impl_sub_binop_specify_output {
             }
         }
 
-        impl<'a> Sub<$rhs> for &'a $lhs {
+        impl<'a> ::core::ops::Sub<$rhs> for &'a $lhs {
             type Output = $output;
 
             #[inline]
@@ -49,7 +49,7 @@ macro_rules! impl_sub_binop_specify_output {
             }
         }
 
-        impl Sub<$rhs> for $lhs {
+        impl ::core::ops::Sub<$rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -69,7 +69,7 @@ macro_rules! impl_binops_additive_specify_output {
 
 macro_rules! impl_binops_multiplicative_mixed {
     ($lhs:ident, $rhs:ident, $output:ident) => {
-        impl<'b> Mul<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::Mul<&'b $rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -78,7 +78,7 @@ macro_rules! impl_binops_multiplicative_mixed {
             }
         }
 
-        impl<'a> Mul<$rhs> for &'a $lhs {
+        impl<'a> ::core::ops::Mul<$rhs> for &'a $lhs {
             type Output = $output;
 
             #[inline]
@@ -87,7 +87,7 @@ macro_rules! impl_binops_multiplicative_mixed {
             }
         }
 
-        impl Mul<$rhs> for $lhs {
+        impl ::core::ops::Mul<$rhs> for $lhs {
             type Output = $output;
 
             #[inline]
@@ -102,28 +102,28 @@ macro_rules! impl_binops_additive {
     ($lhs:ident, $rhs:ident) => {
         impl_binops_additive_specify_output!($lhs, $rhs, $lhs);
 
-        impl SubAssign<$rhs> for $lhs {
+        impl ::core::ops::SubAssign<$rhs> for $lhs {
             #[inline]
             fn sub_assign(&mut self, rhs: $rhs) {
                 *self = &*self - &rhs;
             }
         }
 
-        impl AddAssign<$rhs> for $lhs {
+        impl ::core::ops::AddAssign<$rhs> for $lhs {
             #[inline]
             fn add_assign(&mut self, rhs: $rhs) {
                 *self = &*self + &rhs;
             }
         }
 
-        impl<'b> SubAssign<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::SubAssign<&'b $rhs> for $lhs {
             #[inline]
             fn sub_assign(&mut self, rhs: &'b $rhs) {
                 *self = &*self - rhs;
             }
         }
 
-        impl<'b> AddAssign<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::AddAssign<&'b $rhs> for $lhs {
             #[inline]
             fn add_assign(&mut self, rhs: &'b $rhs) {
                 *self = &*self + rhs;
@@ -136,14 +136,14 @@ macro_rules! impl_binops_multiplicative {
     ($lhs:ident, $rhs:ident) => {
         impl_binops_multiplicative_mixed!($lhs, $rhs, $lhs);
 
-        impl MulAssign<$rhs> for $lhs {
+        impl ::core::ops::MulAssign<$rhs> for $lhs {
             #[inline]
             fn mul_assign(&mut self, rhs: $rhs) {
                 *self = &*self * &rhs;
             }
         }
 
-        impl<'b> MulAssign<&'b $rhs> for $lhs {
+        impl<'b> ::core::ops::MulAssign<&'b $rhs> for $lhs {
             #[inline]
             fn mul_assign(&mut self, rhs: &'b $rhs) {
                 *self = &*self * rhs;