diff --git a/modules/jdk/21/module.yaml b/modules/jdk/21/module.yaml
index 764a16cd..585d4599 100644
--- a/modules/jdk/21/module.yaml
+++ b/modules/jdk/21/module.yaml
@@ -25,6 +25,7 @@ envs:
 packages:
   install:
   - java-21-openjdk-devel
+  - java-21-openjdk-jmods
 
 modules:
   install: