diff --git a/pytket/binders/circuit/boxes.cpp b/pytket/binders/circuit/boxes.cpp
index 2cbe4f02fa..5c559db712 100644
--- a/pytket/binders/circuit/boxes.cpp
+++ b/pytket/binders/circuit/boxes.cpp
@@ -704,9 +704,8 @@ void init_boxes(py::module &m) {
           ":param compute: the compute operation\n"
           ":param action: the action operation\n"
           ":param uncompute: optional uncompute operation, default to "
-          "compute.dagger(). If provided, the user needs to make sure that the "
-          "unitary matrices of uncompute.dagger() and compute must be the "
-          "equal.",
+          "compute.dagger(). If provided, the user needs to make sure that "
+          "uncompute.dagger() and compute have the same unitary.",
           py::arg("compute"), py::arg("action"),
           py::arg("uncompute") = std::nullopt)
       .def(
diff --git a/tket/include/tket/Circuit/ConjugationBox.hpp b/tket/include/tket/Circuit/ConjugationBox.hpp
index 38cb99c4eb..62fac23ad5 100644
--- a/tket/include/tket/Circuit/ConjugationBox.hpp
+++ b/tket/include/tket/Circuit/ConjugationBox.hpp
@@ -32,8 +32,8 @@ class ConjugationBox : public Box {
    * @param compute the compute operation
    * @param action the action operation
    * @param uncompute optional uncompute operation, default to compute.dagger().
-   * If provided, the user needs to make sure that the unitary matrices of
-   * uncompute.dagger() and compute must be equal.
+   * If provided, the user needs to make sure that uncompute.dagger() and
+   * compute have the same unitary.
    */
   explicit ConjugationBox(
       const Op_ptr &compute, const Op_ptr &action,