diff --git a/utils/misc/src/main/java/org/onlab/packet/ICMPEcho.java b/utils/misc/src/main/java/org/onlab/packet/ICMPEcho.java
index aa06cc6847..ff0a76ad97 100644
--- a/utils/misc/src/main/java/org/onlab/packet/ICMPEcho.java
+++ b/utils/misc/src/main/java/org/onlab/packet/ICMPEcho.java
@@ -19,7 +19,6 @@ import java.nio.ByteBuffer;
 
 import static org.onlab.packet.PacketUtils.checkInput;
 import static com.google.common.base.MoreObjects.toStringHelper;
-import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * ICMP packet class for echo purpose.
@@ -77,9 +76,6 @@ public class ICMPEcho extends BasePacket {
      */
     @Override
     public byte[] serialize() {
-        checkNotNull(this.identifier);
-        checkNotNull(this.sequenceNum);
-
         int length = ICMP_ECHO_HEADER_LENGTH;
         byte[] payloadData = null;
         if (this.payload != null) {