diff --git a/examples/slip-radio/project-conf.h b/examples/slip-radio/project-conf.h
index 89e135a42..2f05bec5e 100644
--- a/examples/slip-radio/project-conf.h
+++ b/examples/slip-radio/project-conf.h
@@ -37,7 +37,7 @@
 /*---------------------------------------------------------------------------*/
 #define UIP_CONF_ROUTER                 0
 
-#define CMD_CONF_OUTPUT slip_radio_cmd_output
+#define CMD_CONF_OUTPUT slip_write
 
 /* Default CMD handlers if the target did not specify them */
 #ifndef CMD_CONF_HANDLERS
diff --git a/examples/slip-radio/slip-net.c b/examples/slip-radio/slip-net.c
index 1a787c85c..e1efbf4cf 100644
--- a/examples/slip-radio/slip-net.c
+++ b/examples/slip-radio/slip-net.c
@@ -49,27 +49,6 @@ slipnet_init(void)
 {
 }
 /*---------------------------------------------------------------------------*/
-void
-slip_send_packet(const uint8_t *ptr, int len)
-{
-  uint16_t i;
-  uint8_t c;
-
-  slip_arch_writeb(SLIP_END);
-  for(i = 0; i < len; ++i) {
-    c = *ptr++;
-    if(c == SLIP_END) {
-      slip_arch_writeb(SLIP_ESC);
-      c = SLIP_ESC_END;
-    } else if(c == SLIP_ESC) {
-      slip_arch_writeb(SLIP_ESC);
-      c = SLIP_ESC_ESC;
-    }
-    slip_arch_writeb(c);
-  }
-  slip_arch_writeb(SLIP_END);
-}
-/*---------------------------------------------------------------------------*/
 static void
 slipnet_input(void)
 {
@@ -94,7 +73,7 @@ slipnet_input(void)
   }
   LOG_DBG_("\n");
 
-  slip_send_packet(uip_buf, uip_len);
+  slip_write(uip_buf, uip_len);
 }
 /*---------------------------------------------------------------------------*/
 static uint8_t
diff --git a/examples/slip-radio/slip-radio.c b/examples/slip-radio/slip-radio.c
index 720bc9694..53a0324bc 100644
--- a/examples/slip-radio/slip-radio.c
+++ b/examples/slip-radio/slip-radio.c
@@ -56,8 +56,6 @@
 extern const struct slip_radio_sensors SLIP_RADIO_CONF_SENSORS;
 #endif
 
-void slip_send_packet(const uint8_t *ptr, int len);
-
 /* max 16 packets at the same time??? */
 uint8_t packet_ids[16];
 int packet_pos;
@@ -187,12 +185,6 @@ slip_radio_cmd_handler(const uint8_t *data, int len)
   return 0;
 }
 /*---------------------------------------------------------------------------*/
-void
-slip_radio_cmd_output(const uint8_t *data, int data_len)
-{
-  slip_send_packet(data, data_len);
-}
-/*---------------------------------------------------------------------------*/
 static void
 slip_input_callback(void)
 {
diff --git a/os/dev/slip.c b/os/dev/slip.c
index 4b7021d89..076685d58 100644
--- a/os/dev/slip.c
+++ b/os/dev/slip.c
@@ -110,7 +110,7 @@ slip_send(void)
   return UIP_FW_OK;
 }
 /*---------------------------------------------------------------------------*/
-uint8_t
+void
 slip_write(const void *_ptr, int len)
 {
   const uint8_t *ptr = _ptr;
@@ -130,9 +130,8 @@ slip_write(const void *_ptr, int len)
     }
     slip_arch_writeb(c);
   }
-  slip_arch_writeb(SLIP_END);
 
-  return len;
+  slip_arch_writeb(SLIP_END);
 }
 /*---------------------------------------------------------------------------*/
 static void
diff --git a/os/dev/slip.h b/os/dev/slip.h
index 75ae58fd8..1a9fb68ce 100644
--- a/os/dev/slip.h
+++ b/os/dev/slip.h
@@ -62,7 +62,7 @@ uint8_t slip_send(void);
  */
 int slip_input_byte(unsigned char c);
 
-uint8_t slip_write(const void *ptr, int len);
+void slip_write(const void *ptr, int len);
 
 /**
  * Set a function to be called when there is activity on the SLIP