diff --git a/common/modules/shellprocess_rmcdrom.conf b/common/modules/shellprocess_rmcdrom.conf
index ed18dd3..b01f101 100644
--- a/common/modules/shellprocess_rmcdrom.conf
+++ b/common/modules/shellprocess_rmcdrom.conf
@@ -3,4 +3,5 @@ dontChroot: true
 timeout: 30
 script:
     - rm ${ROOT}/etc/apt/sources.list.d/cdrom.sources
+    - umount ${ROOT}/cdrom
     - rmdir ${ROOT}/cdrom
diff --git a/debian/changelog b/debian/changelog
index 123f4b0..af16843 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+calamares-settings-ubuntu (1:26.04.5) resolute; urgency=medium
+
+  * Fix an install crash caused by a missing `umount` command in
+    shellprocess_rmcdrom.conf.
+
+ -- Aaron Rainbolt <arraybolt3@ubuntu.com>  Thu, 05 Mar 2026 16:21:22 -0500
+
 calamares-settings-ubuntu (1:26.04.4) resolute; urgency=medium
 
   * Fix minimal installation by no longer trying to remove nonexistent