diff --git a/roles/nextcloud/tasks/install.yml b/roles/nextcloud/tasks/install.yml
index 665ede20c..d9d2c83e8 100644
--- a/roles/nextcloud/tasks/install.yml
+++ b/roles/nextcloud/tasks/install.yml
@@ -48,8 +48,9 @@
       - ffmpeg       # Optional (for preview generation)
       - libxml2      # php-libxml requires libxml2 >= 2.7.0
       #- libapache2-mod-php    # 2020-02-15: NO LONGER NEEDED?
+      - php{{ php_version }}-bcmath        # Highly recommended by Nextcloud 21 for "improved performance and better compatibility"
       - php{{ php_version }}-bz2           # Optional (for extraction of apps)
-      - php{{ php_version }}-cli           # Like optional?  @jvonau says this drags in php{{ php_version }}-common as @m-anish wanted in PR #2119 / #2258
+      - php{{ php_version }}-cli           # Likely optional?  @jvonau says this drags in php{{ php_version }}-common as @m-anish wanted in PR #2119 / #2258
       - php{{ php_version }}-curl
       - php{{ php_version }}-gd
       - php{{ php_version }}-gmp           # Optional (for SFTP storage)