diff --git a/au/code/au/quantity.hh b/au/code/au/quantity.hh
index 210bc0a3..a5723550 100644
--- a/au/code/au/quantity.hh
+++ b/au/code/au/quantity.hh
@@ -340,7 +340,7 @@ class Quantity {
     }
 
     template <typename T>
-    void perform_shorthand_checks() {
+    constexpr void perform_shorthand_checks() {
         static_assert(
             IsValidRep<T>::value,
             "This overload is only for scalar mult/div-assignment with raw numeric types");
diff --git a/au/code/au/quantity_test.cc b/au/code/au/quantity_test.cc
index 75cbae98..e5f1d4e0 100644
--- a/au/code/au/quantity_test.cc
+++ b/au/code/au/quantity_test.cc
@@ -481,6 +481,16 @@ TEST(Quantity, ShorthandMultiplicationAssignmentWorksForComplexRepAndScalar) {
     EXPECT_THAT(test, SameTypeAndValue(meters(std::complex<float>{2.5f, 2.5f})));
 }
 
+template <typename T>
+constexpr T double_by_shorthand(T x) {
+    return x *= 2.0;
+}
+
+TEST(Quantity, ShorthandMultiplicationSupportsConstexpr) {
+    constexpr auto x = double_by_shorthand(feet(3.0));
+    EXPECT_THAT(x, SameTypeAndValue(feet(6.0)));
+}
+
 TEST(Quantity, ShorthandDivisionAssignmentWorksForComplexRepAndScalar) {
     auto test = meters(std::complex<float>{25.0f, 12.5f});
     test /= std::complex<float>{3.0f, 4.0f};