diff --git a/macrovision.js b/macrovision.js
index 406d0956..eda7a895 100644
--- a/macrovision.js
+++ b/macrovision.js
@@ -67,6 +67,14 @@ math.createUnit("stories", {
     definition: "12 feet",
     prefixes: "long"
 });
+math.createUnit("buses", {
+    definition: "11.95 meters",
+    prefixes: "long"
+});
+math.createUnit("marathons", {
+    definition: "26.2 miles",
+    prefixes: "long"
+});
 math.createUnit("earths", {
     definition: "12756km",
     prefixes: "long"
@@ -177,7 +185,7 @@ math.createUnit("cars", {
     definition: "1250kg",
     prefixes: "long"
 });
-math.createUnit("buses", {
+math.createUnit("busMasses", {
     definition: "15000kg",
     prefixes: "long"
 });
@@ -295,6 +303,8 @@ const unitChoices = {
         "relative": [
             "humans",
             "stories",
+            "buses",
+            "marathons",
             "earths",
             "lightseconds",
             "solarradii",
@@ -371,7 +381,7 @@ const unitChoices = {
         "relative": [
             "peopleMass",
             "cars",
-            "buses",
+            "busMasses",
             "earthMass",
             "solarmasses"
         ],