diff --git a/configs/sim/udgram/defconfig b/configs/sim/udgram/defconfig
index 2f1c3f74e9..a328786f27 100644
--- a/configs/sim/udgram/defconfig
+++ b/configs/sim/udgram/defconfig
@@ -598,6 +598,12 @@ CONFIG_EXAMPLES_NSH=y
 # CONFIG_EXAMPLES_USBTERM is not set
 CONFIG_EXAMPLES_UDGRAM=y
 CONFIG_EXAMPLES_UDGRAM_ADDR="/var/fifo/fifo"
+CONFIG_EXAMPLES_UDGRAM_SERVER_APPNAME="server"
+CONFIG_EXAMPLES_UDGRAM_SERVER_STACKSIZE=4096
+CONFIG_EXAMPLES_UDGRAM_SERVER_PRIORITY=100
+CONFIG_EXAMPLES_UDGRAM_CLIENT_APPNAME="client"
+CONFIG_EXAMPLES_UDGRAM_CLIENT_STACKSIZE=4096
+CONFIG_EXAMPLES_UDGRAM_CLIENT_PRIORITY=100
 CONFIG_EXAMPLES_USTREAM=y
 CONFIG_EXAMPLES_USTREAM_ADDR="/var/fifo/fifo"
 # CONFIG_EXAMPLES_WATCHDOG is not set