diff --git a/geometry/meter.hpp b/geometry/meter.hpp
index 0ea14f8630..29884e6314 100644
--- a/geometry/meter.hpp
+++ b/geometry/meter.hpp
@@ -6,14 +6,14 @@ using Meter = double;
 
 inline namespace literals
 {
-inline constexpr auto operator"" _m(long double value) noexcept -> Meter
+inline constexpr Meter operator"" _m(long double value) noexcept
 {
-  return {static_cast<double>(value)};
+  return static_cast<double>(value);
 }
 
-inline constexpr auto operator"" _km(long double value) noexcept -> Meter
+inline constexpr Meter operator"" _km(long double value) noexcept
 {
-  return {static_cast<double>(value * 1000.0)};
+  return static_cast<double>(value * 1000.0);
 }
 }  // namespace literals
 }  // namespace m2