diff --git a/src/vec2.rs b/src/vec2.rs
index 34d1667..5f8dc26 100644
--- a/src/vec2.rs
+++ b/src/vec2.rs
@@ -281,7 +281,8 @@ impl<T:Copy + Float + Add<T,T> + Sub<T,T> + Mul<T,T> + Div<T,T> + Neg<T>> Mutabl
     }
 
     fn lerp_self(&mut self, other: &Vec2<T>, amount: T) {
-        self.add_self_v(&other.sub_v(self).mul_t(amount));
+        let v = other.sub_v(self).mul_t(amount);
+        self.add_self_v(&v);
     }
 }
 
diff --git a/src/vec3.rs b/src/vec3.rs
index 3575bc1..2318e94 100644
--- a/src/vec3.rs
+++ b/src/vec3.rs
@@ -313,7 +313,8 @@ impl<T:Copy + Float + Add<T,T> + Sub<T,T> + Mul<T,T> + Div<T,T> + Neg<T>> Mutabl
     }
 
     fn lerp_self(&mut self, other: &Vec3<T>, amount: T) {
-        self.add_self_v(&other.sub_v(self).mul_t(amount));
+        let v = other.sub_v(self).mul_t(amount);
+        self.add_self_v(&v);
     }
 }
 
diff --git a/src/vec4.rs b/src/vec4.rs
index 4fa3a2b..2825b46 100644
--- a/src/vec4.rs
+++ b/src/vec4.rs
@@ -311,7 +311,8 @@ impl<T: Copy + Float + Add<T,T> + Sub<T,T> + Mul<T,T> + Div<T,T> + Neg<T>> Mutab
     }
 
     fn lerp_self(&mut self, other: &Vec4<T>, amount: T) {
-        self.add_self_v(&other.sub_v(self).mul_t(amount));
+        let v = other.sub_v(self).mul_t(amount);
+        self.add_self_v(&v);
     }
 }