diff --git a/utils/misc/src/main/java/org/onlab/packet/IpAddress.java b/utils/misc/src/main/java/org/onlab/packet/IpAddress.java
index 2906798..8a8aca2 100644
--- a/utils/misc/src/main/java/org/onlab/packet/IpAddress.java
+++ b/utils/misc/src/main/java/org/onlab/packet/IpAddress.java
@@ -312,7 +312,7 @@
         if (this == obj) {
             return true;
         }
-        if ((obj == null) || (getClass() != obj.getClass())) {
+        if ((obj == null) || (!(obj instanceof IpAddress))) {
             return false;
         }
         IpAddress other = (IpAddress) obj;
diff --git a/utils/misc/src/main/java/org/onlab/packet/IpPrefix.java b/utils/misc/src/main/java/org/onlab/packet/IpPrefix.java
index c2fc175..11cf902 100644
--- a/utils/misc/src/main/java/org/onlab/packet/IpPrefix.java
+++ b/utils/misc/src/main/java/org/onlab/packet/IpPrefix.java
@@ -221,7 +221,7 @@
         if (this == obj) {
             return true;
         }
-        if ((obj == null) || (getClass() != obj.getClass())) {
+        if ((obj == null) || (!(obj instanceof IpPrefix))) {
             return false;
         }
         IpPrefix other = (IpPrefix) obj;