diff --git a/crates/fj-math/src/circle.rs b/crates/fj-math/src/circle.rs
index 29212cf90..7ae63c8ba 100644
--- a/crates/fj-math/src/circle.rs
+++ b/crates/fj-math/src/circle.rs
@@ -77,6 +77,20 @@ impl<const D: usize> Circle<D> {
     }
 }
 
+impl<const D: usize> approx::AbsDiffEq for Circle<D> {
+    type Epsilon = <Scalar as approx::AbsDiffEq>::Epsilon;
+
+    fn default_epsilon() -> Self::Epsilon {
+        Scalar::default_epsilon()
+    }
+
+    fn abs_diff_eq(&self, other: &Self, epsilon: Self::Epsilon) -> bool {
+        self.center.abs_diff_eq(&other.center, epsilon)
+            && self.a.abs_diff_eq(&other.a, epsilon)
+            && self.b.abs_diff_eq(&other.b, epsilon)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use std::f64::consts::{FRAC_PI_2, PI};