diff --git a/src/systems/si-fps/include/units/isq/si/fps/speed.h b/src/systems/si-fps/include/units/isq/si/fps/speed.h
index cc78443f..816aff3a 100644
--- a/src/systems/si-fps/include/units/isq/si/fps/speed.h
+++ b/src/systems/si-fps/include/units/isq/si/fps/speed.h
@@ -43,7 +43,7 @@ using speed = quantity<dim_speed, U, Rep>;
 
 struct mile_per_hour : derived_unit<mile_per_hour, dim_speed, mile, hour> {};
 struct nautical_mile_per_hour : derived_unit<nautical_mile_per_hour, dim_speed, nautical_mile, hour> {};
-struct knot : alias_unit<nautical_mile_per_hour, "knot", no_prefix> {};
+struct knot : alias_unit<nautical_mile_per_hour, "kn", no_prefix> {};
 
 #ifndef UNITS_NO_LITERALS
 
diff --git a/src/systems/si-international/include/units/isq/si/international/speed.h b/src/systems/si-international/include/units/isq/si/international/speed.h
index df074b84..1f81a592 100644
--- a/src/systems/si-international/include/units/isq/si/international/speed.h
+++ b/src/systems/si-international/include/units/isq/si/international/speed.h
@@ -37,7 +37,7 @@ namespace units::isq::si::international {
 struct mile_per_hour : derived_unit<mile_per_hour, si::dim_speed, si::international::mile, si::hour> {};
 struct nautical_mile_per_hour :
     derived_unit<nautical_mile_per_hour, si::dim_speed, si::international::nautical_mile, si::hour> {};
-struct knot : alias_unit<nautical_mile_per_hour, "knot", no_prefix> {};
+struct knot : alias_unit<nautical_mile_per_hour, "kn", no_prefix> {};
 
 #ifndef UNITS_NO_LITERALS