diff --git a/examples/er-rest-example/er-example-server.c b/examples/er-rest-example/er-example-server.c
index e9cc9d4ba..cccafb26b 100644
--- a/examples/er-rest-example/er-example-server.c
+++ b/examples/er-rest-example/er-example-server.c
@@ -95,7 +95,7 @@
 #warning "Erbium example without CoAP-specifc functionality"
 #endif /* CoAP-specific example */
 
-#define DEBUG 0
+#define DEBUG 1
 #if DEBUG
 #define PRINTF(...) printf(__VA_ARGS__)
 #define PRINT6ADDR(addr) PRINTF("[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_t *)addr)[15])
@@ -479,7 +479,7 @@ pushing_periodic_handler(resource_t *r)
 
   ++obs_counter;
 
-  PRINTF("TICK %u for /%s\n", periodic_i, r->url);
+  PRINTF("TICK %u for /%s\n", obs_counter, r->url);
 
   /* Build notification. */
   coap_packet_t notification[1]; /* This way the packet can be treated as pointer as usual. */