diff --git a/schemas/process.yml b/schemas/process.yml
index 91dd67707..674cfae2b 100644
--- a/schemas/process.yml
+++ b/schemas/process.yml
@@ -206,6 +206,7 @@
       level: extended
       type: keyword
       short: Array of capabilities a thread could assume.
+      pattern: ^(CAP_[A-Z_]+|\d+)$
       description: >
         This is a limiting superset for the effective capabilities that the
         thread may assume.
@@ -217,6 +218,7 @@
       level: extended
       type: keyword
       short: Array of capabilities used for permission checks.
+      pattern: ^(CAP_[A-Z_]+|\d+)$
       description: >
         This is the set of capabilities used by the kernel to perform permission
         checks for the thread.