diff --git a/docs/system/system-metrics.md b/docs/system/system-metrics.md
index 82d0addcab..8cd6cf5cc9 100644
--- a/docs/system/system-metrics.md
+++ b/docs/system/system-metrics.md
@@ -981,8 +981,8 @@ This metric is [recommended][MetricRecommended].
 | `system.filesystem.usage` | UpDownCounter | `By` | Reports a filesystem's space usage across different states. [1] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 
 
-**[1]:** The sum over all `system.filesystem.state` values SHOULD equal the total storage
-capacity of the filesystem, that is `system.filesystem.limit`.
+**[1]:** The sum of all `system.filesystem.usage` values over the different `system.filesystem.state` attributes
+SHOULD equal the total storage capacity of the filesystem, that is `system.filesystem.limit`.
 
 
 
diff --git a/model/metrics/system-metrics.yaml b/model/metrics/system-metrics.yaml
index c0374f4f79..583e421def 100644
--- a/model/metrics/system-metrics.yaml
+++ b/model/metrics/system-metrics.yaml
@@ -226,8 +226,8 @@ groups:
     stability: experimental
     brief: "Reports a filesystem's space usage across different states."
     note: |
-      The sum over all `system.filesystem.state` values SHOULD equal the total storage
-      capacity of the filesystem, that is `system.filesystem.limit`.
+      The sum of all `system.filesystem.usage` values over the different `system.filesystem.state` attributes
+      SHOULD equal the total storage capacity of the filesystem, that is `system.filesystem.limit`.
     instrument: updowncounter
     unit: "By"
     attributes: