diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionDownlink.java b/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionDownlink.java
index c35410b..8146d2b 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionDownlink.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionDownlink.java
@@ -75,7 +75,7 @@
 
     @Override
     public String toString() {
-        return "UESessionDL{" + matchString() + " -> " + actionString();
+        return "UESessionDL{" + matchString() + " -> " + actionString() + "}";
     }
 
     private String matchString() {
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionUplink.java b/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionUplink.java
index 70db84c..a2f0460 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionUplink.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/upf/SessionUplink.java
@@ -72,7 +72,7 @@
 
     @Override
     public String toString() {
-        return "UESessionUL{" + matchString() + " -> " + actionString();
+        return "UESessionUL{" + matchString() + " -> " + actionString() + "}";
     }
 
     private String matchString() {
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationDownlink.java b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationDownlink.java
index 3bc9a91..1c11dcc 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationDownlink.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationDownlink.java
@@ -141,7 +141,7 @@
 
     @Override
     public String toString() {
-        return "TerminationUL{" + matchString() + "->" + actionString() + "}";
+        return "TerminationDL{" + matchString() + "->" + actionString() + "}";
     }
 
     private String matchString() {
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationUplink.java b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationUplink.java
index 74dbc01..f759202 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationUplink.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfTerminationUplink.java
@@ -117,7 +117,7 @@
 
     @Override
     public String toString() {
-        return "TerminationDL{" + matchString() + "->" + actionString() + "}";
+        return "TerminationUL{" + matchString() + "->" + actionString() + "}";
     }
 
     private String matchString() {