diff --git a/apps/serial-shell/serial-shell.c b/apps/serial-shell/serial-shell.c
index d8ba9740b..f05edc64d 100644
--- a/apps/serial-shell/serial-shell.c
+++ b/apps/serial-shell/serial-shell.c
@@ -67,7 +67,10 @@ shell_default_output(const char *text1, int len1, const char *text2, int len2)
     text2 = "";
     len2 = 0;
   }
-  printf("%.*s%.*s\r\n", len1, text1, len2, text2);
+
+  /* Workaround for absence of "%.*s" format in avr-libc */
+  /*printf("%.*s%.*s\r\n", len1, text1, len2, text2);*/
+  printf("%s%s\r\n", text1, text2);
 }
 /*---------------------------------------------------------------------------*/
 void
diff --git a/platform/iris/platform-conf.h b/platform/iris/platform-conf.h
index 04b7e3b6c..de7590314 100644
--- a/platform/iris/platform-conf.h
+++ b/platform/iris/platform-conf.h
@@ -47,11 +47,10 @@
 #define PLATFORM PLATFORM_AVR
 
 #define HARWARE_REVISION IRIS
-//#define RAVEN_REVISION RAVEN_D
 
 /*
  * MCU and clock rate.
- * MICAZ runs on 7.3728 MHz clock.
+ * IRIS runs on 8 MHz clock.
  */
 #define MCU_MHZ 8