diff --git a/platform/cc2530dk/contiki-main.c b/platform/cc2530dk/contiki-main.c
index a8154e1d1..b10238286 100644
--- a/platform/cc2530dk/contiki-main.c
+++ b/platform/cc2530dk/contiki-main.c
@@ -44,8 +44,6 @@ extern volatile uint8_t sleep_flag;
 #endif
 /*---------------------------------------------------------------------------*/
 extern rimeaddr_t rimeaddr_node_addr;
-static __data int r;
-static __data int len;
 /*---------------------------------------------------------------------------*/
 #if ENERGEST_CONF_ON
 static unsigned long irq_energest = 0;
@@ -261,6 +259,8 @@ main(void) CC_NON_BANKED
   fade(LEDS_YELLOW);
 
   while(1) {
+    uint8_t r;
+    static uint16_t len;
     do {
       /* Reset watchdog and handle polls and events */
       watchdog_periodic();