diff --git a/tsdb/head.go b/tsdb/head.go
index 7530613735..f1916c69ee 100644
--- a/tsdb/head.go
+++ b/tsdb/head.go
@@ -47,7 +47,7 @@ var (
 	// be ingested.
 	ErrInvalidSample = errors.New("invalid sample")
 	// ErrAppenderClosed is returned if an appender has already be successfully
-	// rolled back or commited.
+	// rolled back or committed.
 	ErrAppenderClosed = errors.New("appender closed")
 )
 
diff --git a/tsdb/querier_test.go b/tsdb/querier_test.go
index 9694e1e72b..281ffaefed 100644
--- a/tsdb/querier_test.go
+++ b/tsdb/querier_test.go
@@ -835,7 +835,7 @@ func TestPopulateWithTombSeriesIterators(t *testing.T) {
 				expandedResult, err := storage.ExpandChunks(it)
 				testutil.Ok(t, err)
 
-				// We don't care about ref IDs for comparision, only chunk's samples matters.
+				// We don't care about ref IDs for comparison, only chunk's samples matters.
 				rmChunkRefs(expandedResult)
 				rmChunkRefs(tc.expectedChks)
 				testutil.Equals(t, tc.expectedChks, expandedResult)