diff --git a/docs/users_guide/framework_basics/text_output.md b/docs/users_guide/framework_basics/text_output.md
index d0c2a12e..9731c360 100644
--- a/docs/users_guide/framework_basics/text_output.md
+++ b/docs/users_guide/framework_basics/text_output.md
@@ -289,7 +289,7 @@ std::cout << 6.7 * l_per_100km << "\n";
 prints:
 
 ```text
-6.7 l/[100 km]
+6.7 L/[100 km]
 ```
 
 
diff --git a/src/systems/include/mp-units/systems/si/units.h b/src/systems/include/mp-units/systems/si/units.h
index 54130dd0..cf6521b7 100644
--- a/src/systems/include/mp-units/systems/si/units.h
+++ b/src/systems/include/mp-units/systems/si/units.h
@@ -105,7 +105,7 @@ inline constexpr struct arcminute final : named_unit<symbol_text{u8"′", "'"},
 inline constexpr struct arcsecond final : named_unit<symbol_text{u8"″", "''"}, mag_ratio<1, 60> * arcminute> {} arcsecond;
 inline constexpr struct are final : named_unit<"a", square(si::deca<si::metre>)> {} are;
 inline constexpr auto hectare = si::hecto<are>;
-inline constexpr struct litre final : named_unit<"l", cubic(si::deci<si::metre>)> {} litre;
+inline constexpr struct litre final : named_unit<"L", cubic(si::deci<si::metre>)> {} litre;
 inline constexpr struct tonne final : named_unit<"t", mag<1000> * si::kilogram> {} tonne;
 inline constexpr struct dalton final : named_unit<"Da", mag_ratio<16'605'390'666'050, 10'000'000'000'000> * mag_power<10, -27> * si::kilogram> {} dalton;
 // TODO A different value is provided in the SI Brochure and different in the ISO 80000
diff --git a/test/static/unit_symbol_test.cpp b/test/static/unit_symbol_test.cpp
index f053147d..9e9b5376 100644
--- a/test/static/unit_symbol_test.cpp
+++ b/test/static/unit_symbol_test.cpp
@@ -267,7 +267,7 @@ static_assert(unit_symbol(pow<1, 2>(metre)) == "m^(1/2)");
 static_assert(unit_symbol(pow<3, 5>(metre)) == "m^(3/5)");
 static_assert(unit_symbol(pow<1, 2>(metre / second)) == "m^(1/2)/s^(1/2)");
 static_assert(unit_symbol<usf{.solidus = never}>(pow<1, 2>(metre / second)) == "m^(1/2) s^-(1/2)");
-static_assert(unit_symbol(litre / (mag<100> * kilo<metre>)) == "l/[100 km]");
+static_assert(unit_symbol(litre / (mag<100> * kilo<metre>)) == "L/[100 km]");
 static_assert(unit_symbol((mag<10> * metre) / (mag<20> * second)) == "[10 m]/[20 s]");
 static_assert(unit_symbol(pow<2>(mag<3600> * second)) == "[3600 s]²");