diff --git a/src/angle.rs b/src/angle.rs
index ff30b4a..abc208a 100644
--- a/src/angle.rs
+++ b/src/angle.rs
@@ -123,13 +123,13 @@ macro_rules! impl_angle {
             fn rem(lhs, rhs) -> $Angle<S> { $Angle::new(lhs.s % rhs.s) }
         });
         impl_assignment_operator!(<S: BaseFloat> AddAssign<$Angle<S> > for $Angle<S> {
-            fn add_assign(&mut self, other) { self.s + other.s; }
+            fn add_assign(&mut self, other) { self.s += other.s; }
         });
         impl_assignment_operator!(<S: BaseFloat> SubAssign<$Angle<S> > for $Angle<S> {
-            fn sub_assign(&mut self, other) { self.s - other.s; }
+            fn sub_assign(&mut self, other) { self.s -= other.s; }
         });
         impl_assignment_operator!(<S: BaseFloat> RemAssign<$Angle<S> > for $Angle<S> {
-            fn rem_assign(&mut self, other) { self.s % other.s; }
+            fn rem_assign(&mut self, other) { self.s %= other.s; }
         });
 
         impl_operator!(<S: BaseFloat> Mul<S> for $Angle<S> {
@@ -139,10 +139,10 @@ macro_rules! impl_angle {
             fn div(lhs, scalar) -> $Angle<S> { $Angle::new(lhs.s / scalar) }
         });
         impl_assignment_operator!(<S: BaseFloat> MulAssign<S> for $Angle<S> {
-            fn mul_assign(&mut self, scalar) { self.s * scalar; }
+            fn mul_assign(&mut self, scalar) { self.s *= scalar; }
         });
         impl_assignment_operator!(<S: BaseFloat> DivAssign<S> for $Angle<S> {
-            fn div_assign(&mut self, scalar) { self.s / scalar; }
+            fn div_assign(&mut self, scalar) { self.s /= scalar; }
         });
 
         impl<S: BaseFloat> ApproxEq for $Angle<S> {