diff --git a/src/systems/si-fps/include/units/isq/si/fps/length.h b/src/systems/si-fps/include/units/isq/si/fps/length.h
index c037afe1..a4307180 100644
--- a/src/systems/si-fps/include/units/isq/si/fps/length.h
+++ b/src/systems/si-fps/include/units/isq/si/fps/length.h
@@ -52,7 +52,7 @@ struct kiloyard : prefixed_unit<kiloyard, si::kilo, yard> {};
 
 struct mile : named_scaled_unit<mile, "mile", no_prefix, ratio(5'280), foot> {};
 
-struct nautical_mile : named_scaled_unit<nautical_mile, "mi(naut)", no_prefix, ratio(2'000), yard> {};
+struct nautical_mile : named_scaled_unit<nautical_mile, "nmi", no_prefix, ratio(2'000), yard> {};
 
 struct dim_length : isq::dim_length<foot> {};
 
diff --git a/src/systems/si-international/include/units/isq/si/international/length.h b/src/systems/si-international/include/units/isq/si/international/length.h
index 38b7eac3..e37944a0 100644
--- a/src/systems/si-international/include/units/isq/si/international/length.h
+++ b/src/systems/si-international/include/units/isq/si/international/length.h
@@ -56,7 +56,7 @@ struct mile : named_scaled_unit<mile, "mi", no_prefix, ratio(25'146, 15'625), si
 
 // si::international nautical mile
 // https://en.wikipedia.org/wiki/Nautical_mile
-struct nautical_mile : named_scaled_unit<nautical_mile, "mi(naut)", no_prefix, ratio(1852), si::metre> {};
+struct nautical_mile : named_scaled_unit<nautical_mile, "nmi", no_prefix, ratio(1852), si::metre> {};
 
 // thou
 // https://en.wikipedia.org/wiki/Thousandth_of_an_inch
diff --git a/test/unit_test/runtime/fmt_units_test.cpp b/test/unit_test/runtime/fmt_units_test.cpp
index c94c3734..8414e5a0 100644
--- a/test/unit_test/runtime/fmt_units_test.cpp
+++ b/test/unit_test/runtime/fmt_units_test.cpp
@@ -65,7 +65,7 @@ TEST_CASE("std::format on synthesized unit symbols", "[text][fmt]")
     CHECK(STD_FMT::format("{}", 1_q_fathom_us) == "1 fathom(us)");
     CHECK(STD_FMT::format("{}", 1_q_mi) == "1 mi");
     CHECK(STD_FMT::format("{}", 1_q_mi_us) == "1 mi(us)");
-    CHECK(STD_FMT::format("{}", 1_q_naut_mi) == "1 mi(naut)");
+    CHECK(STD_FMT::format("{}", 1_q_naut_mi) == "1 nmi");
     CHECK(STD_FMT::format("{}", 1_q_ch) == "1 ch");
     CHECK(STD_FMT::format("{}", 1_q_rd) == "1 rd");
     CHECK(STD_FMT::format("{}", 1_q_thou) == "1 thou");