diff --git a/plugins/inputs/statsd/running_stats.go b/plugins/inputs/statsd/running_stats.go
index 3ce03a87760d7985ec8c3e927a4ccb13879646b9..2395ab143f45d51f3372f7cf59291f59d8d29a94 100644
--- a/plugins/inputs/statsd/running_stats.go
+++ b/plugins/inputs/statsd/running_stats.go
@@ -110,8 +110,15 @@ func (rs *RunningStats) Percentile(n int) float64 {
 	}
 
 	i := int(float64(len(rs.perc)) * float64(n) / float64(100))
-	if i < 0 {
-		i = 0
+	return rs.perc[clamp(i, 0, len(rs.perc)-1)]
+}
+
+func clamp(i int, min int, max int) int {
+	if i < min {
+		return min
+	}
+	if i > max {
+		return max
 	}
-	return rs.perc[i]
+	return i
 }
diff --git a/plugins/inputs/statsd/running_stats_test.go b/plugins/inputs/statsd/running_stats_test.go
index 614de9cec657d9c633a24fdf87d11b5a0ed244af..4571f76d7a60256823a4291f078349fd89411518 100644
--- a/plugins/inputs/statsd/running_stats_test.go
+++ b/plugins/inputs/statsd/running_stats_test.go
@@ -23,12 +23,18 @@ func TestRunningStats_Single(t *testing.T) {
 	if rs.Lower() != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Lower())
 	}
+	if rs.Percentile(100) != 10.1 {
+		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(100))
+	}
 	if rs.Percentile(90) != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(90))
 	}
 	if rs.Percentile(50) != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(50))
 	}
+	if rs.Percentile(0) != 10.1 {
+		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(0))
+	}
 	if rs.Count() != 1 {
 		t.Errorf("Expected %v, got %v", 1, rs.Count())
 	}
@@ -58,12 +64,18 @@ func TestRunningStats_Duplicate(t *testing.T) {
 	if rs.Lower() != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Lower())
 	}
+	if rs.Percentile(100) != 10.1 {
+		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(100))
+	}
 	if rs.Percentile(90) != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(90))
 	}
 	if rs.Percentile(50) != 10.1 {
 		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(50))
 	}
+	if rs.Percentile(0) != 10.1 {
+		t.Errorf("Expected %v, got %v", 10.1, rs.Percentile(0))
+	}
 	if rs.Count() != 4 {
 		t.Errorf("Expected %v, got %v", 4, rs.Count())
 	}
@@ -93,12 +105,18 @@ func TestRunningStats(t *testing.T) {
 	if rs.Lower() != 5 {
 		t.Errorf("Expected %v, got %v", 5, rs.Lower())
 	}
+	if rs.Percentile(100) != 45 {
+		t.Errorf("Expected %v, got %v", 45, rs.Percentile(100))
+	}
 	if rs.Percentile(90) != 32 {
 		t.Errorf("Expected %v, got %v", 32, rs.Percentile(90))
 	}
 	if rs.Percentile(50) != 11 {
 		t.Errorf("Expected %v, got %v", 11, rs.Percentile(50))
 	}
+	if rs.Percentile(0) != 5 {
+		t.Errorf("Expected %v, got %v", 5, rs.Percentile(0))
+	}
 	if rs.Count() != 16 {
 		t.Errorf("Expected %v, got %v", 4, rs.Count())
 	}