diff --git a/core/sched.c b/core/sched.c
index 047a254c8b..6ea14e757d 100644
--- a/core/sched.c
+++ b/core/sched.c
@@ -36,7 +36,11 @@ volatile int last_pid = -1;
 clist_node_t *runqueues[SCHED_PRIO_LEVELS];
 static uint32_t runqueue_bitcache = 0;
 
+void sched_register_cb(void (*callback)(uint32_t, uint32_t));
+
+
 #if SCHEDSTATISTICS
+    static void (*sched_cb)(uint32_t timestamp, uint32_t value) = NULL;
     schedstat pidlist[MAXTHREADS];
 #endif
 
@@ -134,6 +138,11 @@ void sched_run() {
     DEBUG("scheduler: done.\n");
 }
 
+#if SCHEDSTATISTICS
+void sched_register_cb(void (*callback)(uint32_t, uint32_t)) {
+    sched_cb = callback;    
+}
+#endif
 
 void sched_set_status(tcb_t *process, unsigned int status) {
     if (status &  STATUS_ON_RUNQUEUE) {
diff --git a/cpu/lpc2387/include/lpc2387-rtc.h b/cpu/lpc2387/include/lpc2387-rtc.h
index 1f7793fa23..080a330cfc 100644
--- a/cpu/lpc2387/include/lpc2387-rtc.h
+++ b/cpu/lpc2387/include/lpc2387-rtc.h
@@ -51,7 +51,7 @@ and the mailinglist (subscription via web site)
 #include <rtc.h>
 #include <time.h>
 #include <sys/time.h>
-#include <lpc2387.h>
+#include "lpc2387.h"
 
 /* ------------------------------------------------------------------------- */
 /**
diff --git a/drivers/cc110x/cc1100-csmaca-mac.c b/drivers/cc110x/cc1100-csmaca-mac.c
index c632fcaba1..efa875631a 100644
--- a/drivers/cc110x/cc1100-csmaca-mac.c
+++ b/drivers/cc110x/cc1100-csmaca-mac.c
@@ -41,10 +41,10 @@ and the mailinglist (subscription via web site)
 #include <stdlib.h>
 #include <string.h>
 
-#include "cc1100.h"
-#include "cc1100_phy.h"
-#include "cc1100-csmaca-mac.h"
-#include "protocol-multiplex.h"
+#include <cc1100.h>
+#include <cc1100_phy.h>
+#include <cc1100-csmaca-mac.h>
+#include <protocol-multiplex.h>
 
 #include "hwtimer.h"
 #include <vtimer.h>
diff --git a/projects/cc110x/main.c b/projects/cc110x/main.c
index c552a7939f..59a91c2c87 100644
--- a/projects/cc110x/main.c
+++ b/projects/cc110x/main.c
@@ -4,8 +4,8 @@
 #include <msg.h>
 #include <kernel.h>
 
-#include "drivers/cc110x/cc1100.h"
-#include "radio/radio.h"
+#include <cc1100.h>
+#include <radio/radio.h>
 
 #include "gpioint.h"
 #include "hwtimer.h"
diff --git a/sys/shell/shell_commands.c b/sys/shell/shell_commands.c
index 964b47588a..037045a288 100644
--- a/sys/shell/shell_commands.c
+++ b/sys/shell/shell_commands.c
@@ -49,7 +49,6 @@ extern void _get_blocksize(char* unused);
 extern void _get_sectorcount(char* unused);
 extern void _read_sector(char* sector);
 extern void _read_bytes(char* bytes);
-extern void _write_bytes(char* bytes);
 #endif
 
 const shell_command_t _shell_command_list[] = {