diff --git a/src/inet/UDPEndPointImplLwIP.cpp b/src/inet/UDPEndPointImplLwIP.cpp
index edc409e73c9e8d..9679ff94ca064f 100644
--- a/src/inet/UDPEndPointImplLwIP.cpp
+++ b/src/inet/UDPEndPointImplLwIP.cpp
@@ -256,7 +256,7 @@ void UDPEndPointImplLwIP::CloseImpl()
         // event pending in the event queue (SystemLayer::ScheduleLambda), we
         // schedule a release call to the end of the queue, to ensure that the
         // queued pointer to UDPEndPointImplLwIP is not dangling.
-        if (mDelayRelease == true)
+        if (mDelayRelease)
         {
             mDelayRelease = false;
 
diff --git a/src/inet/UDPEndPointImplLwIP.h b/src/inet/UDPEndPointImplLwIP.h
index 21213c77e976e9..ce5ea05a6fe79e 100644
--- a/src/inet/UDPEndPointImplLwIP.h
+++ b/src/inet/UDPEndPointImplLwIP.h
@@ -61,7 +61,7 @@ class UDPEndPointImplLwIP : public UDPEndPoint, public EndPointStateLwIP
     static void LwIPReceiveUDPMessage(void * arg, struct udp_pcb * pcb, struct pbuf * p, const ip_addr_t * addr, u16_t port);
 
     udp_pcb * mUDP; // LwIP User datagram protocol (UDP) control block.
-    bool mDelayRelease = false;
+    std::atomic<bool> mDelayRelease = false;
 };
 
 using UDPEndPointImpl = UDPEndPointImplLwIP;