diff --git a/internal/collector/postgres_locks.go b/internal/collector/postgres_locks.go
index a740af1..1b47ae9 100644
--- a/internal/collector/postgres_locks.go
+++ b/internal/collector/postgres_locks.go
@@ -58,7 +58,16 @@ func (c *postgresLocksCollector) Update(config Config, ch chan<- prometheus.Metr
 func parsePostgresLocksStats(r *model.PGResult) map[string]float64 {
 	log.Debug("parse postgres locks stats")
 
-	stats := make(map[string]float64)
+	stats := map[string]float64{
+		"AccessShareLock":          0,
+		"RowShareLock":             0,
+		"RowExclusiveLock":         0,
+		"ShareUpdateExclusiveLock": 0,
+		"ShareLock":                0,
+		"ShareRowExclusiveLock":    0,
+		"ExclusiveLock":            0,
+		"AccessExclusiveLock":      0,
+	}
 
 	for _, row := range r.Rows {
 		if len(row) != 2 {
diff --git a/internal/collector/postgres_locks_test.go b/internal/collector/postgres_locks_test.go
index f12944b..0224b64 100644
--- a/internal/collector/postgres_locks_test.go
+++ b/internal/collector/postgres_locks_test.go
@@ -40,10 +40,14 @@ func Test_parsePostgresLocksStats(t *testing.T) {
 				},
 			},
 			want: map[string]float64{
-				"RowExclusiveLock": 150,
-				"RowShareLock":     100,
-				"ExclusiveLock":    50,
-				"AccessShareLock":  2000,
+				"AccessShareLock":          2000,
+				"RowShareLock":             100,
+				"RowExclusiveLock":         150,
+				"ShareUpdateExclusiveLock": 0,
+				"ShareLock":                0,
+				"ShareRowExclusiveLock":    0,
+				"ExclusiveLock":            50,
+				"AccessExclusiveLock":      0,
 			},
 		},
 	}