diff --git a/examples/er-rest-example/resources/res-b1-sep-b2.c b/examples/er-rest-example/resources/res-b1-sep-b2.c
index 06390da62..7dcbdd0ca 100644
--- a/examples/er-rest-example/resources/res-b1-sep-b2.c
+++ b/examples/er-rest-example/resources/res-b1-sep-b2.c
@@ -67,7 +67,7 @@ res_post_handler(void *request, void *response, uint8_t *buffer, uint16_t prefer
     coap_separate_accept(request, &request_metadata);
 
     /* Need Time for calculation now */
-    int i;
+    unsigned i;
     for(i = 0; i <= 4096; i++) {
       printf("\r%4u\r", i);
     }