diff --git a/examples/sky-shell-webserver/sky-shell-webserver.c b/examples/sky-shell-webserver/sky-shell-webserver.c
index 57f85c368..f89e19ac1 100644
--- a/examples/sky-shell-webserver/sky-shell-webserver.c
+++ b/examples/sky-shell-webserver/sky-shell-webserver.c
@@ -40,8 +40,6 @@
 
 #include <stdio.h>
 #include <string.h>
-#include <io.h>
-#include <signal.h>
 
 /*---------------------------------------------------------------------------*/
 PROCESS(sky_shell_process, "Sky Contiki shell w. webserver");
diff --git a/examples/z1/test-sht25.c b/examples/z1/test-sht25.c
index 25d308f3b..6137e9753 100644
--- a/examples/z1/test-sht25.c
+++ b/examples/z1/test-sht25.c
@@ -57,7 +57,7 @@ PROCESS_THREAD(test_sht25_process, ev, data)
     temperature = sht25.value(SHT25_VAL_TEMP);
     printf("Temperature %d.%d ºC\n", temperature / 100, temperature % 100);
     humidity = sht25.value(SHT25_VAL_HUM);
-    printf("Humidity %d.%d %RH\n", humidity / 100, humidity % 100);
+    printf("Humidity %d.%d %%RH\n", humidity / 100, humidity % 100);
   }
   PROCESS_END();
 }