diff --git a/src/core/mac/mac.cpp b/src/core/mac/mac.cpp
index e27f5533f..c8a71c5ac 100644
--- a/src/core/mac/mac.cpp
+++ b/src/core/mac/mac.cpp
@@ -766,6 +766,11 @@ ThreadError Mac::ProcessReceiveSecurity(Frame &aFrame, const Address &aSrcAddr,
 
     aFrame.SetSecurityValid(true);
 
+    if (keySequence > mKeyManager.GetCurrentKeySequence())
+    {
+        mKeyManager.SetCurrentKeySequence(keySequence);
+    }
+
 exit:
 
     if (error != kThreadError_None)
diff --git a/src/core/thread/key_manager.cpp b/src/core/thread/key_manager.cpp
index 4ca38d280..51c93db9a 100644
--- a/src/core/thread/key_manager.cpp
+++ b/src/core/thread/key_manager.cpp
@@ -104,13 +104,16 @@ uint32_t KeyManager::GetCurrentKeySequence() const
 
 void KeyManager::SetCurrentKeySequence(uint32_t aKeySequence)
 {
-    mKeySequence = aKeySequence;
-    ComputeKey(mKeySequence, mKey);
+    if (aKeySequence != mKeySequence)
+    {
+        mKeySequence = aKeySequence;
+        ComputeKey(mKeySequence, mKey);
 
-    mMacFrameCounter = 0;
-    mMleFrameCounter = 0;
+        mMacFrameCounter = 0;
+        mMleFrameCounter = 0;
 
-    mNetif.SetStateChangedFlags(OT_NET_KEY_SEQUENCE);
+        mNetif.SetStateChangedFlags(OT_NET_KEY_SEQUENCE);
+    }
 }
 
 const uint8_t *KeyManager::GetCurrentMacKey() const