diff --git a/pkg/config/config.go b/pkg/config/config.go
index 119b1a1a..fd77f587 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -120,7 +120,7 @@ func setupPrometheus() {
 		Global.Prometheus.EvalCounter = promauto.NewCounterVec(prometheus.CounterOpts{
 			Name: "flagr_eval_results",
 			Help: "A counter of eval results",
-		}, []string{"EntityType", "FlagID", "VariantID", "VariantKey"})
+		}, []string{"EntityType", "FlagID", "FlagKey", "VariantID", "VariantKey"})
 		Global.Prometheus.RequestCounter = promauto.NewCounterVec(prometheus.CounterOpts{
 			Name: "flagr_requests_total",
 			Help: "The total http requests received",
diff --git a/pkg/handler/eval.go b/pkg/handler/eval.go
index 3b7ed4f9..ce8c1a7c 100644
--- a/pkg/handler/eval.go
+++ b/pkg/handler/eval.go
@@ -248,6 +248,7 @@ var logEvalResultToPrometheus = func(r *models.EvalResult) {
 	config.Global.Prometheus.EvalCounter.WithLabelValues(
 		util.SafeStringWithDefault(r.EvalContext.EntityType, "null"),
 		util.SafeStringWithDefault(r.FlagID, "null"),
+		util.SafeStringWithDefault(r.FlagKey, "null"),
 		util.SafeStringWithDefault(r.VariantID, "null"),
 		util.SafeStringWithDefault(r.VariantKey, "null"),
 	).Inc()