diff --git a/frontend/src/certs/Registers/RegisterSidebar.tsx b/frontend/src/certs/Registers/RegisterSidebar.tsx
index 7fda9e1..2152ec9 100644
--- a/frontend/src/certs/Registers/RegisterSidebar.tsx
+++ b/frontend/src/certs/Registers/RegisterSidebar.tsx
@@ -1,4 +1,5 @@
 import { Register } from "../../types/Register";
+import { courseMap } from "../../utils/allCourses";
 import { formatDate } from "../../utils/functions";
 
 export function RegisterSidebar(props: {register: Register, close: () => void, onDelete: () => void}) {
@@ -14,6 +15,8 @@ export function RegisterSidebar(props: {register: Register, close: () => void, o
         }
     };
 
+    const courseName = () => courseMap()[props.register.register_course_id]?.course_name ?? "<curso no encontrado>";
+
     return (
         <div class="absolute top-0 bg-c-surface-variant right-0
                     py-4 px-6 w-[20rem]
@@ -22,7 +25,7 @@ export function RegisterSidebar(props: {register: Register, close: () => void, o
             <p class="text-xl mb-8">Detalles del certificado</p>
 
             <p class="underline text-lg">Curso</p>
-            <p class="mb-4">Matpel 2</p>
+            <p class="mb-4">{courseName()}</p>
 
             <p class="underline text-lg">Código del certificado</p>
             <p class="mb-4">{props.register.register_code}</p>