diff --git a/src/field/crandall_field.rs b/src/field/crandall_field.rs
index c3627713..3b98e203 100644
--- a/src/field/crandall_field.rs
+++ b/src/field/crandall_field.rs
@@ -224,6 +224,7 @@ impl Add for CrandallField {
 }
 
 impl AddAssign for CrandallField {
+    #[inline]
     fn add_assign(&mut self, rhs: Self) {
         *self = *self + rhs;
     }