diff --git a/cpu/native/include/native_internal.h b/cpu/native/include/native_internal.h
index 5c63ffc2f2..28c814c734 100644
--- a/cpu/native/include/native_internal.h
+++ b/cpu/native/include/native_internal.h
@@ -46,6 +46,12 @@
 
 #include "kernel_types.h"
 
+
+/**
+ * Prototype for native's internal callbacks
+ */
+typedef void (*_native_callback_t)(void);
+
 /**
  * internal functions
  */
@@ -120,7 +126,7 @@ ssize_t _native_write(int fd, const void *buf, size_t count);
 /**
  * register interrupt handler handler for interrupt sig
  */
-int register_interrupt(int sig, void (*handler)(void));
+int register_interrupt(int sig, _native_callback_t handler);
 
 /**
  * unregister interrupt handler for interrupt sig
diff --git a/cpu/native/irq_cpu.c b/cpu/native/irq_cpu.c
index e78f1a440f..a921d2b9bb 100644
--- a/cpu/native/irq_cpu.c
+++ b/cpu/native/irq_cpu.c
@@ -59,10 +59,7 @@ volatile unsigned int _native_saved_eip;
 volatile int _native_sigpend;
 int _sig_pipefd[2];
 
-struct int_handler_t {
-    void (*func)(void);
-};
-static struct int_handler_t native_irq_handlers[255];
+static _native_callback_t native_irq_handlers[255];
 char sigalt_stk[SIGSTKSZ];
 
 void print_thread_sigmask(ucontext_t *cp)
@@ -74,7 +71,7 @@ void print_thread_sigmask(ucontext_t *cp)
     }
 
     for (int i = 1; i < (NSIG); i++) {
-        if (native_irq_handlers[i].func != NULL) {
+        if (native_irq_handlers[i] != NULL) {
             printf("%s: %s\n",
                    strsignal(i),
                    (sigismember(&_native_sig_set, i) ? "blocked" : "unblocked")
@@ -121,7 +118,7 @@ void native_print_signals(void)
     }
 
     for (int i = 1; i < (NSIG); i++) {
-        if (native_irq_handlers[i].func != NULL || i == SIGUSR1) {
+        if (native_irq_handlers[i] != NULL || i == SIGUSR1) {
             printf("%s: %s in active thread\n",
                    strsignal(i),
                    (sigismember(&_native_sig_set, i) ? "blocked" : "unblocked")
@@ -259,9 +256,9 @@ void native_irq_handler(void)
         int sig = _native_popsig();
         _native_sigpend--;
 
-        if (native_irq_handlers[sig].func != NULL) {
+        if (native_irq_handlers[sig] != NULL) {
             DEBUG("calling interrupt handler for %i\n", sig);
-            native_irq_handlers[sig].func();
+            native_irq_handlers[sig]();
         }
         else if (sig == SIGUSR1) {
             DEBUG("ignoring SIGUSR1\n");
@@ -360,7 +357,7 @@ void native_isr_entry(int sig, siginfo_t *info, void *context)
  * TODO: use appropriate data structure for signal
  *       handlers.
  */
-int register_interrupt(int sig, void (*handler)(void))
+int register_interrupt(int sig, _native_callback_t handler)
 {
     DEBUG("register_interrupt()\n");
 
@@ -369,7 +366,7 @@ int register_interrupt(int sig, void (*handler)(void))
         err(EXIT_FAILURE, "register_interrupt: sigdelset");
     }
 
-    native_irq_handlers[sig].func = handler;
+    native_irq_handlers[sig] = handler;
 
     /* set current dINT sigmask for all signals */
     struct sigaction sa;
@@ -377,7 +374,7 @@ int register_interrupt(int sig, void (*handler)(void))
     sa.sa_mask = _native_sig_set_dint;
     sa.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
     for (int i = 0; i < 255; i++) {
-        if (native_irq_handlers[i].func != NULL) {
+        if (native_irq_handlers[i] != NULL) {
             if (sigaction(sig, &sa, NULL)) {
                 err(EXIT_FAILURE, "register_interrupt: sigaction");
             }
@@ -400,7 +397,7 @@ int unregister_interrupt(int sig)
         err(EXIT_FAILURE, "unregister_interrupt: sigaddset");
     }
 
-    native_irq_handlers[sig].func = NULL;
+    native_irq_handlers[sig] = NULL;
 
     /* reset signal handler for sig */
     struct sigaction sa;
@@ -413,7 +410,7 @@ int unregister_interrupt(int sig)
     /* change sigmask for remaining signal handlers */
     sa.sa_sigaction = native_isr_entry;
     for (int i = 0; i < 255; i++) {
-        if (native_irq_handlers[i].func != NULL) {
+        if (native_irq_handlers[i] != NULL) {
             if (sigaction(sig, &sa, NULL)) {
                 err(EXIT_FAILURE, "register_interrupt: sigaction");
             }
@@ -451,7 +448,7 @@ void native_interrupt_init(void)
     _native_sigpend = 0;
 
     for (int i = 0; i < 255; i++) {
-        native_irq_handlers[i].func = NULL;
+        native_irq_handlers[i] = NULL;
     }
 
     sa.sa_sigaction = native_isr_entry;
diff --git a/cpu/native/net/interface.c b/cpu/native/net/interface.c
index 43ac8b9faf..4e596535d1 100644
--- a/cpu/native/net/interface.c
+++ b/cpu/native/net/interface.c
@@ -29,15 +29,13 @@
 #include "transceiver.h"
 #include "msg.h"
 
+#include "native_internal.h"
 #include "tap.h"
 #include "nativenet.h"
 #include "nativenet_internal.h"
 #include "cpu.h"
 
-struct nativenet_callback_s {
-    void (*func)(void);
-};
-static struct nativenet_callback_s _nativenet_callbacks[255];
+static _native_callback_t _nativenet_callbacks[255];
 
 struct rx_buffer_s _nativenet_rx_buffer[RX_BUF_SIZE];
 static volatile uint8_t rx_buffer_next;
@@ -151,14 +149,14 @@ void nativenet_switch_to_rx(void)
 /* nativenet_internal.h *************************************************/
 /************************************************************************/
 
-int _nativenet_register_cb(int event, void (*func)(void))
+int _nativenet_register_cb(int event, _native_callback_t func)
 {
     if (event > NNEV_MAXEV) {
         DEBUG("_nativenet_register_cb: event > NNEV_MAXEV\n");
         return -1;
     }
 
-    _nativenet_callbacks[event].func = func;
+    _nativenet_callbacks[event] = func;
     return 0;
 }
 
@@ -169,7 +167,7 @@ int _nativenet_unregister_cb(int event)
         return -1;
     }
 
-    _nativenet_callbacks[event].func = NULL;
+    _nativenet_callbacks[event] = NULL;
     return 0;
 }
 
@@ -180,8 +178,8 @@ void do_cb(int event)
         return;
     }
 
-    if (_nativenet_callbacks[event].func != NULL) {
-        _nativenet_callbacks[event].func();
+    if (_nativenet_callbacks[event] != NULL) {
+        _nativenet_callbacks[event]();
     }
 }