diff --git a/geometry/src/rect.rs b/geometry/src/rect.rs
index 858c2712..1a449cd9 100644
--- a/geometry/src/rect.rs
+++ b/geometry/src/rect.rs
@@ -12,7 +12,7 @@
 
 use crate::vector::{IntoVector2F, Vector2F, Vector2I};
 use pathfinder_simd::default::{F32x4, I32x4};
-use std::ops::{Add, Mul, Sub};
+use std::ops::{Add, AddAssign, Mul, MulAssign, Sub, SubAssign};
 
 #[derive(Clone, Copy, Debug, PartialEq, Default)]
 pub struct RectF(pub F32x4);
@@ -198,6 +198,13 @@ impl Add<Vector2F> for RectF {
     }
 }
 
+impl AddAssign<Vector2F> for RectF {
+    #[inline]
+    fn add_assign(&mut self, other: Vector2F) {
+        *self = *self + other
+    }
+}
+
 impl Add<f32> for RectF {
     type Output = RectF;
     #[inline]
@@ -206,6 +213,13 @@ impl Add<f32> for RectF {
     }
 }
 
+impl AddAssign<f32> for RectF {
+    #[inline]
+    fn add_assign(&mut self, other: f32) {
+        *self = *self + other
+    }
+}
+
 impl Mul<Vector2F> for RectF {
     type Output = RectF;
     #[inline]
@@ -214,6 +228,13 @@ impl Mul<Vector2F> for RectF {
     }
 }
 
+impl MulAssign<Vector2F> for RectF {
+    #[inline]
+    fn mul_assign(&mut self, other: Vector2F) {
+        *self = *self * other
+    }
+}
+
 impl Mul<f32> for RectF {
     type Output = RectF;
     #[inline]
@@ -222,6 +243,13 @@ impl Mul<f32> for RectF {
     }
 }
 
+impl MulAssign<f32> for RectF {
+    #[inline]
+    fn mul_assign(&mut self, other: f32) {
+        *self = *self * other
+    }
+}
+
 impl Sub<Vector2F> for RectF {
     type Output = RectF;
     #[inline]
@@ -230,6 +258,13 @@ impl Sub<Vector2F> for RectF {
     }
 }
 
+impl SubAssign<Vector2F> for RectF {
+    #[inline]
+    fn sub_assign(&mut self, other: Vector2F) {
+        *self = *self - other
+    }
+}
+
 impl Sub<f32> for RectF {
     type Output = RectF;
     #[inline]
@@ -238,6 +273,13 @@ impl Sub<f32> for RectF {
     }
 }
 
+impl SubAssign<f32> for RectF {
+    #[inline]
+    fn sub_assign(&mut self, other: f32) {
+        *self = *self - other
+    }
+}
+
 /// NB: The origin is inclusive, while the lower right point is exclusive.
 #[derive(Clone, Copy, Debug, PartialEq, Default)]
 pub struct RectI(pub I32x4);