diff --git a/geom/aabb.cpp b/geom/aabb.cpp
index 74b75a1f..8a826025 100644
--- a/geom/aabb.cpp
+++ b/geom/aabb.cpp
@@ -152,8 +152,7 @@ template <size_t S, typename T>
 std::ostream&
 util::geom::operator<< (std::ostream &os, util::geom::aabb<S,T> b)
 {
-    os << "aabb(" << b.p0 << ", " << b.p1 << ")";
-    return os;
+    return os << "[ " << b.p0 << ", " << b.p1 << " ]";
 }