diff --git a/src/core/meshcop/dtls.cpp b/src/core/meshcop/dtls.cpp
index 74ee348fa62..45c893ece96 100644
--- a/src/core/meshcop/dtls.cpp
+++ b/src/core/meshcop/dtls.cpp
@@ -148,7 +148,7 @@ Error Dtls::Open(ReceiveHandler aReceiveHandler, ConnectedHandler aConnectedHand
 
     mConnectedCallback.Set(aConnectedHandler, aContext);
     mReceiveCallback.Set(aReceiveHandler, aContext);
-    mState   = kStateOpen;
+    mState = kStateOpen;
 
 exit:
     return error;
@@ -453,8 +453,8 @@ void Dtls::Close(void)
 {
     Disconnect();
 
-    mState            = kStateClosed;
-    mTimerSet         = false;
+    mState    = kStateClosed;
+    mTimerSet = false;
     mTransportCallback.Clear();
 
     IgnoreError(mSocket.Close());