diff --git a/src/internet/model/arp-cache.cc b/src/internet/model/arp-cache.cc
index f323ffc5a..dacf53cfa 100644
--- a/src/internet/model/arp-cache.cc
+++ b/src/internet/model/arp-cache.cc
@@ -88,7 +88,11 @@ void
 ArpCache::DoDispose()
 {
     NS_LOG_FUNCTION(this);
-    Flush();
+    for (auto& iter : m_arpCache)
+    {
+        delete iter.second; /* delete the pointer ArpCache::Entry */
+    }
+    m_arpCache.clear();
     m_device = nullptr;
     m_interface = nullptr;
     if (!m_waitReplyTimer.IsPending())
diff --git a/src/internet/model/ndisc-cache.cc b/src/internet/model/ndisc-cache.cc
index 9ffa1b07e..6c7d021bf 100644
--- a/src/internet/model/ndisc-cache.cc
+++ b/src/internet/model/ndisc-cache.cc
@@ -53,7 +53,11 @@ void
 NdiscCache::DoDispose()
 {
     NS_LOG_FUNCTION(this);
-    Flush();
+    for (auto& iter : m_ndCache)
+    {
+        delete iter.second; /* delete the pointer NdiscCache::Entry */
+    }
+    m_ndCache.clear();
     m_device = nullptr;
     m_interface = nullptr;
     m_icmpv6 = nullptr;