diff --git a/examples/platform-specific/zoul/at-test/project-conf.h b/examples/platform-specific/zoul/at-test/project-conf.h
index f2f918b48..3b756a01b 100644
--- a/examples/platform-specific/zoul/at-test/project-conf.h
+++ b/examples/platform-specific/zoul/at-test/project-conf.h
@@ -55,8 +55,6 @@
 
 /* Override serial-line defaults */
 #define SERIAL_LINE_CONF_BUFSIZE 128
-#undef IGNORE_CHAR
-#undef END
 #define IGNORE_CHAR(c) (c == 0x0d)
 #define END 0x0a
 
diff --git a/examples/platform-specific/zoul/orion/client/project-conf.h b/examples/platform-specific/zoul/orion/client/project-conf.h
index cbe867a14..ca2361f0a 100644
--- a/examples/platform-specific/zoul/orion/client/project-conf.h
+++ b/examples/platform-specific/zoul/orion/client/project-conf.h
@@ -35,7 +35,6 @@
 /* Use either the cc1200_driver for sub-1GHz, or cc2538_rf_driver (default)
  * for 2.4GHz built-in radio interface
  */
-#undef  NETSTACK_CONF_RADIO
 #define NETSTACK_CONF_RADIO              cc2538_rf_driver
 
 /* Alternate between ANTENNA_SW_SELECT_SUBGHZ or ANTENNA_SW_SELECT_2_4GHZ */
diff --git a/examples/platform-specific/zoul/orion/ip64-router/project-conf.h b/examples/platform-specific/zoul/orion/ip64-router/project-conf.h
index 3918b646b..100145a80 100644
--- a/examples/platform-specific/zoul/orion/ip64-router/project-conf.h
+++ b/examples/platform-specific/zoul/orion/ip64-router/project-conf.h
@@ -55,7 +55,6 @@
 /* Use either the cc1200_driver for sub-1GHz, or cc2538_rf_driver (default)
  * for 2.4GHz built-in radio interface
  */
-#undef  NETSTACK_CONF_RADIO
 #define NETSTACK_CONF_RADIO         cc2538_rf_driver
 
 /* USe DHCP */