diff --git a/src/cluster.c b/src/cluster.c
index caa1e5798b..a2683d33ac 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -778,6 +778,33 @@ int isValidAuxString(char *s, unsigned int length) {
     return 1;
 }
 
+int verifyPortNumber(client *c, long long *port, long long *cport) {
+    if (getLongLongFromObject(c->argv[3], port) != C_OK) {
+        addReplyErrorFormat(c, "Invalid base port specified: %s", (char *)c->argv[3]->ptr);
+        return C_ERR;
+    }
+    if (*port <= 0 || *port > 65535) {
+        addReplyErrorFormat(c, "Port number is out of range");
+        return C_ERR;
+    }
+
+    if (c->argc == 5) {
+        if (getLongLongFromObject(c->argv[4], cport) != C_OK) {
+            addReplyErrorFormat(c, "Invalid bus port specified: %s", (char *)c->argv[4]->ptr);
+            return C_ERR;
+        }
+    } else {
+        *cport = *port + CLUSTER_PORT_INCR;
+    }
+
+    if (*cport <= 0 || *cport > 65535) {
+        addReplyErrorFormat(c, "Cport number is out of range");
+        return C_ERR;
+    }
+
+    return C_OK;
+}
+
 void clusterCommandMyId(client *c) {
     char *name = clusterNodeGetName(getMyClusterNode());
     if (name) {
diff --git a/src/cluster.h b/src/cluster.h
index 142f2d70b3..fdc7099509 100644
--- a/src/cluster.h
+++ b/src/cluster.h
@@ -134,4 +134,5 @@ int isNodeAvailable(clusterNode *node);
 long long getNodeReplicationOffset(clusterNode *node);
 sds aggregateClientOutputBuffer(client *c);
 void resetClusterStats(void);
+int verifyPortNumber(client *c, long long *port, long long *cport);
 #endif /* __CLUSTER_H */
diff --git a/src/cluster_legacy.c b/src/cluster_legacy.c
index 1facd9a94b..32d9ecc7fc 100644
--- a/src/cluster_legacy.c
+++ b/src/cluster_legacy.c
@@ -6880,27 +6880,7 @@ int clusterCommandSpecial(client *c) {
         /* CLUSTER MEET <ip> <port> [cport] */
         long long port, cport;
 
-        if (getLongLongFromObject(c->argv[3], &port) != C_OK) {
-            addReplyErrorFormat(c, "Invalid base port specified: %s", (char *)c->argv[3]->ptr);
-            return 1;
-        }
-
-        if (port <= 0 || port > 65535) {
-            addReplyErrorFormat(c, "Port number is out of range");
-            return 1;
-        }
-
-        if (c->argc == 5) {
-            if (getLongLongFromObject(c->argv[4], &cport) != C_OK) {
-                addReplyErrorFormat(c, "Invalid bus port specified: %s", (char *)c->argv[4]->ptr);
-                return 1;
-            }
-        } else {
-            cport = port + CLUSTER_PORT_INCR;
-        }
-
-        if (cport <= 0 || cport > 65535) {
-            addReplyErrorFormat(c, "Cport number is out of range");
+        if (verifyPortNumber(c, &port, &cport) == C_ERR) {
             return 1;
         }