diff --git a/promql/lex.go b/promql/lex.go
index dde2799f30..d3b611e90b 100644
--- a/promql/lex.go
+++ b/promql/lex.go
@@ -66,7 +66,7 @@ func (i ItemType) isAggregatorWithParam() bool {
 // Returns false otherwise.
 func (i ItemType) isKeyword() bool { return i > keywordsStart && i < keywordsEnd }
 
-// isCompairsonOperator returns true if the item corresponds to a comparison operator.
+// isComparisonOperator returns true if the item corresponds to a comparison operator.
 // Returns false otherwise.
 func (i ItemType) isComparisonOperator() bool {
 	switch i {
diff --git a/tsdb/wal/live_reader.go b/tsdb/wal/live_reader.go
index 6d29036884..446e859940 100644
--- a/tsdb/wal/live_reader.go
+++ b/tsdb/wal/live_reader.go
@@ -32,7 +32,7 @@ type liveReaderMetrics struct {
 	readerCorruptionErrors *prometheus.CounterVec
 }
 
-// NewLiveReaderMetrics instatiates, registers and returns metrics to be injected
+// NewLiveReaderMetrics instantiates, registers and returns metrics to be injected
 // at LiveReader instantiation.
 func NewLiveReaderMetrics(reg prometheus.Registerer) *liveReaderMetrics {
 	m := &liveReaderMetrics{