diff --git a/plugins/inputs/socket/socket.go b/plugins/inputs/socket/socket.go
index 0174b2f53..2152ea222 100644
--- a/plugins/inputs/socket/socket.go
+++ b/plugins/inputs/socket/socket.go
@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"fmt"
 	"log"
-	"math"
 	"net"
 	"os"
 	"strings"
@@ -14,7 +13,6 @@ import (
 	"github.com/influxdata/telegraf"
 
 	"github.com/influxdata/telegraf/internal/encoding"
-	"github.com/influxdata/telegraf/internal/encoding/graphite"
 	"github.com/influxdata/telegraf/plugins/inputs"
 
 	_ "github.com/influxdata/telegraf/internal/encoding/graphite"
@@ -303,13 +301,6 @@ func (s *Socket) handleLines(buf []byte) {
 	// Parse it.
 	metrics, err := s.encodingParser.Parse(buf)
 	if err != nil {
-		switch err := err.(type) {
-		case *graphite.UnsupposedValueError:
-			// Socket ignores NaN values with no error.
-			if math.IsNaN(err.Value) {
-				return
-			}
-		}
 		s.logger.Printf("unable to parse lines: %s: %s", buf, err)
 		return
 	}