diff --git a/components/esp_modem/examples/simple_cmux_client/main/Kconfig.projbuild b/components/esp_modem/examples/simple_cmux_client/main/Kconfig.projbuild
index 16c0da168..7c6d91752 100644
--- a/components/esp_modem/examples/simple_cmux_client/main/Kconfig.projbuild
+++ b/components/esp_modem/examples/simple_cmux_client/main/Kconfig.projbuild
@@ -119,4 +119,10 @@ menu "Example Configuration"
         help
             Close the multiplexed mode at the end of the example and rollback to command mode.
 
+    config BROKER_URI
+        string "Broker URL"
+        default "mqtt://test.mosquitto.org"
+        help
+            URL of an mqtt broker which this example connects to.
+
 endmenu
diff --git a/components/esp_modem/examples/simple_cmux_client/main/simple_cmux_client_main.cpp b/components/esp_modem/examples/simple_cmux_client/main/simple_cmux_client_main.cpp
index 0f3f4b760..d54fdeb03 100644
--- a/components/esp_modem/examples/simple_cmux_client/main/simple_cmux_client_main.cpp
+++ b/components/esp_modem/examples/simple_cmux_client/main/simple_cmux_client_main.cpp
@@ -34,7 +34,7 @@
 #define EXAMPLE_FLOW_CONTROL ESP_MODEM_FLOW_CONTROL_HW
 #endif
 
-#define BROKER_URL "mqtt://mqtt.eclipseprojects.io"
+#define BROKER_URL CONFIG_BROKER_URI
 
 
 using namespace esp_modem;