diff --git a/pkg/controller/resourceclaim/controller.go b/pkg/controller/resourceclaim/controller.go
index f83a19d3be0..2d7d33e0c20 100644
--- a/pkg/controller/resourceclaim/controller.go
+++ b/pkg/controller/resourceclaim/controller.go
@@ -1057,14 +1057,14 @@ func (collector *customCollector) CollectWithStability(ch chan<- metrics.Metric)
 		}
 		rcMetrics[resourceclaimmetrics.NumResourceClaimLabels{Allocated: allocated, AdminAccess: adminAccess, Source: source}]++
 	}
-	for label, count := range rcMetrics {
+	for rcLabels, count := range rcMetrics {
 		ch <- metrics.NewLazyConstMetric(
 			resourceclaimmetrics.NumResourceClaimsDesc,
 			metrics.GaugeValue,
 			float64(count),
-			label.Allocated,
-			label.AdminAccess,
-			label.Source,
+			rcLabels.Allocated,
+			rcLabels.AdminAccess,
+			rcLabels.Source,
 		)
 	}
 }
diff --git a/pkg/controller/resourceclaim/controller_test.go b/pkg/controller/resourceclaim/controller_test.go
index a3afc329b17..33e207effd7 100644
--- a/pkg/controller/resourceclaim/controller_test.go
+++ b/pkg/controller/resourceclaim/controller_test.go
@@ -1177,8 +1177,8 @@ func newNumMetrics(lister resourcelisters.ResourceClaimLister) numMetrics {
 	}
 }
 
-func (em numMetrics) withUpdates(label resourceclaimmetrics.NumResourceClaimLabels, n float64) numMetrics {
-	em.metrics[label] += n
+func (em numMetrics) withUpdates(rcLabels resourceclaimmetrics.NumResourceClaimLabels, n float64) numMetrics {
+	em.metrics[rcLabels] += n
 	return numMetrics{
 		metrics: em.metrics,
 		lister:  em.lister,
diff --git a/pkg/controller/resourceclaim/metrics/metrics.go b/pkg/controller/resourceclaim/metrics/metrics.go
index cb36ec63185..293b3f80b83 100644
--- a/pkg/controller/resourceclaim/metrics/metrics.go
+++ b/pkg/controller/resourceclaim/metrics/metrics.go
@@ -47,10 +47,14 @@ var (
 	)
 
 	// NumResourceClaimsDesc tracks the number of ResourceClaims,
-	// categorized by their allocation status and admin access.
+	// categorized by their allocation status, admin access, and source.
+	// Source can be 'resource_claim_template' (created from a template),
+	// 'extended_resource' (extended resources), or empty (manually created by a user).
 	NumResourceClaimsDesc = metrics.NewDesc(
 		metrics.BuildFQName("", ResourceClaimSubsystem, "resource_claims"),
-		"Number of ResourceClaims, categorized by allocation status and admin access",
+		"Number of ResourceClaims, categorized by allocation status, admin access, and source. "+
+			"Source can be 'resource_claim_template' (created from a template), "+
+			"'extended_resource' (extended resources), or empty (manually created by a user).",
 		[]string{"allocated", "admin_access", "source"}, nil,
 		metrics.ALPHA, "")
 )