diff --git a/platform/cc2530dk/contiki-conf.h b/platform/cc2530dk/contiki-conf.h
index ae7a9641a..c673b0f43 100644
--- a/platform/cc2530dk/contiki-conf.h
+++ b/platform/cc2530dk/contiki-conf.h
@@ -62,6 +62,10 @@
 #define USB_SERIAL_CONF_BUFFERED 1
 #endif
 
+#if defined (UIP_FALLBACK_INTERFACE) || defined (CMD_CONF_OUTPUT)
+#define SLIP_ARCH_CONF_ENABLE      1
+#endif
+
 /* Are we a SLIP bridge? */
 #if SLIP_ARCH_CONF_ENABLE
 /* Make sure the UART is enabled, with interrupts */
diff --git a/platform/sensinode/contiki-conf.h b/platform/sensinode/contiki-conf.h
index 21ae8f655..d7d9aa30c 100644
--- a/platform/sensinode/contiki-conf.h
+++ b/platform/sensinode/contiki-conf.h
@@ -62,6 +62,10 @@
 #define UART_ONE_CONF_HIGH_SPEED 0
 #endif
 
+#if defined (UIP_FALLBACK_INTERFACE) || defined (CMD_CONF_OUTPUT)
+#define SLIP_ARCH_CONF_ENABLE      1
+#endif
+
 /* Are we a SLIP bridge? */
 #if SLIP_ARCH_CONF_ENABLE
 /* Make sure UART1 is enabled, with interrupts */