diff --git a/scrapers/fireroad.py b/scrapers/fireroad.py
index ac525eaf..74263297 100644
--- a/scrapers/fireroad.py
+++ b/scrapers/fireroad.py
@@ -437,6 +437,7 @@ def get_course_data(
             "name": course.get("title", ""),
             "inCharge": ",".join(course.get("instructors", [])),  # type: ignore
             "virtualStatus": course.get("virtual_status", "") == "Virtual",
+            "is_half_class": course.get("is_half_class", False),
         }
     )
 
diff --git a/scrapers/overrides.toml.d/override-schema.json b/scrapers/overrides.toml.d/override-schema.json
index 3aff4f74..c734f7a9 100644
--- a/scrapers/overrides.toml.d/override-schema.json
+++ b/scrapers/overrides.toml.d/override-schema.json
@@ -388,6 +388,11 @@
         "title": "New",
         "description": "True if subject is new"
       },
+      "is_half_class": {
+        "type": "boolean",
+        "title": "Half HASS-A",
+        "description": "True if class counts as half HASS-A"
+      },
       "rating": {
         "type": "number",
         "title": "Rating",
diff --git a/scrapers/overrides.toml.d/sem/21h.toml b/scrapers/overrides.toml.d/sem/21h.toml
index f201e3dc..70335e04 100644
--- a/scrapers/overrides.toml.d/sem/21h.toml
+++ b/scrapers/overrides.toml.d/sem/21h.toml
@@ -15,3 +15,6 @@ inCharge = "I. Kumekawa"
 url = "https://history.mit.edu/subjects/special-subject-history-4/"
 hass = ["H"]
 new = true
+
+["21M.460"]
+is_half_class = true
\ No newline at end of file
diff --git a/scrapers/package.py b/scrapers/package.py
index 07cc45f8..5330e937 100644
--- a/scrapers/package.py
+++ b/scrapers/package.py
@@ -151,6 +151,9 @@ def run() -> None:
             | get_include(overrides_all)
             | get_include(overrides_sem),
         )
+        for course_num, course in courses.items():
+            if course_num.startswith("21M.1") or course_num.startswith("21M.4"):
+                course["is_half_class"] = True
 
         term_info = get_term_info(sem)
         url_name = term_info["urlName"]
diff --git a/src/components/ActivityDescription.tsx b/src/components/ActivityDescription.tsx
index 3d74dff3..5c7b441b 100644
--- a/src/components/ActivityDescription.tsx
+++ b/src/components/ActivityDescription.tsx
@@ -1,5 +1,6 @@
 import { useContext } from "react";
 import { decode } from "html-entities";
+import { HASS } from "../lib/raw";
 
 import {
   Flex,
@@ -110,7 +111,12 @@ function ClassTypes(props: { cls: Class }) {
     ["phys2", "Physics 2"],
     ["rest", "REST"],
     ["hassH", "HASS-H"],
-    ["hassA", "HASS-A"],
+    [
+      "hassA",
+      cls.rawClass.hass.includes(HASS.A) && cls.rawClass.is_half_class
+        ? "HASS-A (half)"
+        : "HASS-A",
+    ],
     ["hassS", "HASS-S"],
     ["hassE", "HASS-E"],
     ["cih", "CI-H"],
diff --git a/src/lib/raw.ts b/src/lib/raw.ts
index 9e7b3178..9424f7f9 100644
--- a/src/lib/raw.ts
+++ b/src/lib/raw.ts
@@ -10,6 +10,8 @@ export interface RawClass {
   subject: string;
   /** True if some section is not scheduled yet */
   tba: boolean;
+  /** True if this counts as half of a HASS-A class */
+  is_half_class?: boolean;
 
   /** Kinds of sections (among LECTURE, RECITATION, LAB, DESIGN) that exist */
   sectionKinds: SectionKind[];