diff --git a/tsdb/block_test.go b/tsdb/block_test.go
index 7cc0735b56..a4b68e6805 100644
--- a/tsdb/block_test.go
+++ b/tsdb/block_test.go
@@ -738,7 +738,7 @@ func createHeadWithOOOSamples(tb testing.TB, w *wlog.WL, series []storage.Series
 	require.NoError(tb, app.Commit())
 
 	oooSamplesAppended := 0
-	require.Equal(tb, float64(0), prom_testutil.ToFloat64(head.metrics.successulSamplesAppended.WithLabelValues(oooAppends)))
+	require.Equal(tb, float64(0), prom_testutil.ToFloat64(head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends)))
 
 	app = head.Appender(context.Background())
 	for i, lset := range oooSampleLabels {
@@ -751,11 +751,11 @@ func createHeadWithOOOSamples(tb testing.TB, w *wlog.WL, series []storage.Series
 	}
 	require.NoError(tb, app.Commit())
 
-	actOOOAppended := prom_testutil.ToFloat64(head.metrics.successulSamplesAppended.WithLabelValues(oooAppends))
+	actOOOAppended := prom_testutil.ToFloat64(head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends))
 	require.GreaterOrEqual(tb, actOOOAppended, float64(oooSamplesAppended-len(series)))
 	require.LessOrEqual(tb, actOOOAppended, float64(oooSamplesAppended))
 
-	require.Equal(tb, float64(totalSamples), prom_testutil.ToFloat64(head.metrics.successulSamplesAppended.WithLabelValues(successfulAppends)))
+	require.Equal(tb, float64(totalSamples), prom_testutil.ToFloat64(head.metrics.successfulSamplesAppended.WithLabelValues(successfulAppends)))
 
 	return head
 }
diff --git a/tsdb/head.go b/tsdb/head.go
index b5fa540c7e..bf6bd69826 100644
--- a/tsdb/head.go
+++ b/tsdb/head.go
@@ -342,16 +342,16 @@ func (h *Head) resetInMemoryState() error {
 }
 
 type headMetrics struct {
-	activeAppenders          prometheus.Gauge
-	series                   prometheus.GaugeFunc
-	seriesCreated            prometheus.Counter
-	seriesRemoved            prometheus.Counter
-	seriesNotFound           prometheus.Counter
-	chunks                   prometheus.Gauge
-	chunksCreated            prometheus.Counter
-	chunksRemoved            prometheus.Counter
-	gcDuration               prometheus.Summary
-	successulSamplesAppended *prometheus.CounterVec
+	activeAppenders           prometheus.Gauge
+	series                    prometheus.GaugeFunc
+	seriesCreated             prometheus.Counter
+	seriesRemoved             prometheus.Counter
+	seriesNotFound            prometheus.Counter
+	chunks                    prometheus.Gauge
+	chunksCreated             prometheus.Counter
+	chunksRemoved             prometheus.Counter
+	gcDuration                prometheus.Summary
+	successfulSamplesAppended *prometheus.CounterVec
 	// samplesAppended          *prometheus.CounterVec
 	// outOfOrderSamplesAppended *prometheus.CounterVec
 	// outOfBoundSamples         *prometheus.CounterVec
@@ -435,8 +435,8 @@ func newHeadMetrics(h *Head, r prometheus.Registerer) *headMetrics {
 			Name: "prometheus_tsdb_data_replay_duration_seconds",
 			Help: "Time taken to replay the data on disk.",
 		}),
-		successulSamplesAppended: prometheus.NewCounterVec(prometheus.CounterOpts{
-			Name: "prometheus_tsdb_head_sucessful_samples_appended_total",
+		successfulSamplesAppended: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "prometheus_tsdb_head_successful_samples_appended_total",
 			Help: "Total number of successful appended samples including out of order samples.",
 		}, []string{"reason", "type"}),
 		sampleAppendFailures: prometheus.NewCounterVec(prometheus.CounterOpts{
@@ -532,7 +532,7 @@ func newHeadMetrics(h *Head, r prometheus.Registerer) *headMetrics {
 			m.walCorruptionsTotal,
 			m.dataTotalReplayDuration,
 			// m.samplesAppended,
-			m.successulSamplesAppended,
+			m.successfulSamplesAppended,
 			// m.outOfOrderSamplesAppended,
 			m.sampleAppendFailures,
 			// m.outOfBoundSamples,
diff --git a/tsdb/head_append.go b/tsdb/head_append.go
index 3d7f911389..c170c757a4 100644
--- a/tsdb/head_append.go
+++ b/tsdb/head_append.go
@@ -1508,12 +1508,12 @@ func (a *headAppender) Commit() (err error) {
 	a.head.metrics.sampleAppendFailures.WithLabelValues(outOfBounds, sampleMetricTypeFloat).Add(float64(acc.floatOOBRejected))
 	// a.head.metrics.tooOldSamples.WithLabelValues(sampleMetricTypeFloat).Add(float64(acc.floatTooOldRejected))
 	a.head.metrics.sampleAppendFailures.WithLabelValues(tooOld, sampleMetricTypeFloat).Add(float64(acc.floatTooOldRejected))
-	a.head.metrics.successulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeFloat).Add(float64(acc.floatsAppended))
-	a.head.metrics.successulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram).Add(float64(acc.floatsAppended))
+	a.head.metrics.successfulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeFloat).Add(float64(acc.floatsAppended))
+	a.head.metrics.successfulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram).Add(float64(acc.histogramsAppended))
 	// a.head.metrics.samplesAppended.WithLabelValues(sampleMetricTypeFloat).Add(float64(acc.floatsAppended))
 	// a.head.metrics.samplesAppended.WithLabelValues(sampleMetricTypeHistogram).Add(float64(acc.histogramsAppended))
-	a.head.metrics.successulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeFloat).Add(float64(acc.oooFloatsAccepted))
-	a.head.metrics.successulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeHistogram).Add(float64(acc.oooHistogramAccepted))
+	a.head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeFloat).Add(float64(acc.oooFloatsAccepted))
+	a.head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeHistogram).Add(float64(acc.oooHistogramAccepted))
 	// a.head.metrics.outOfOrderSamplesAppended.WithLabelValues(sampleMetricTypeFloat).Add(float64(acc.oooFloatsAccepted))
 	// a.head.metrics.outOfOrderSamplesAppended.WithLabelValues(sampleMetricTypeHistogram).Add(float64(acc.oooHistogramAccepted))
 	a.head.updateMinMaxTime(acc.inOrderMint, acc.inOrderMaxt)
diff --git a/tsdb/head_test.go b/tsdb/head_test.go
index 6ec9117350..5c0883ddfa 100644
--- a/tsdb/head_test.go
+++ b/tsdb/head_test.go
@@ -4379,7 +4379,7 @@ func TestHistogramMetrics(t *testing.T) {
 		}
 	}
 
-	require.Equal(t, float64(expHSamples), prom_testutil.ToFloat64(head.metrics.successulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram)))
+	require.Equal(t, float64(expHSamples), prom_testutil.ToFloat64(head.metrics.successfulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram)))
 
 	require.NoError(t, head.Close())
 	w, err := wlog.NewSize(nil, nil, head.wal.Dir(), 32768, wlog.CompressionNone)
@@ -4388,7 +4388,7 @@ func TestHistogramMetrics(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, head.Init(0))
 
-	require.Equal(t, float64(0), prom_testutil.ToFloat64(head.metrics.successulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram))) // Counter reset.
+	require.Equal(t, float64(0), prom_testutil.ToFloat64(head.metrics.successfulSamplesAppended.WithLabelValues(successfulAppends, sampleMetricTypeHistogram))) // Counter reset.
 }
 
 func TestHistogramStaleSample(t *testing.T) {
diff --git a/tsdb/testutil.go b/tsdb/testutil.go
index a8fe6b1391..03c21c9f2b 100644
--- a/tsdb/testutil.go
+++ b/tsdb/testutil.go
@@ -149,8 +149,8 @@ func requireEqualSeries(t *testing.T, expected, actual map[string][]chunks.Sampl
 
 func requireEqualOOOSamples(t *testing.T, expectedSamples int, db *DB) {
 	require.Equal(t, float64(expectedSamples),
-		prom_testutil.ToFloat64(db.head.metrics.successulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeFloat))+
-			prom_testutil.ToFloat64(db.head.metrics.successulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeHistogram)),
+		prom_testutil.ToFloat64(db.head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeFloat))+
+			prom_testutil.ToFloat64(db.head.metrics.successfulSamplesAppended.WithLabelValues(oooAppends, sampleMetricTypeHistogram)),
 		"number of ooo appended samples mismatch")
 }