diff --git a/TEST_APPS/device/socket_app/cmd_socket.cpp b/TEST_APPS/device/socket_app/cmd_socket.cpp
index 7ecf176133..d07c4e8f00 100644
--- a/TEST_APPS/device/socket_app/cmd_socket.cpp
+++ b/TEST_APPS/device/socket_app/cmd_socket.cpp
@@ -673,6 +673,7 @@ static nsapi_size_or_error_t start_udp_receiver_thread(SInfo *info, int argc, ch
     int *packetSizes = new (nothrow) int[PACKET_SIZE_ARRAY_LEN];
     if (!packetSizes) {
         cmd_printf("Allocation failed\r\n");
+        free(dataIn);
         return CMDLINE_RETCODE_FAIL;
     }
     for (int i = 0; i < PACKET_SIZE_ARRAY_LEN; i++) {