diff --git a/cpu/native/irq_cpu.c b/cpu/native/irq_cpu.c
index f7ca88e36d..96ac53db33 100644
--- a/cpu/native/irq_cpu.c
+++ b/cpu/native/irq_cpu.c
@@ -45,8 +45,6 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-extern volatile tcb_t *sched_active_thread;
-
 volatile int native_interrupts_enabled;
 volatile int _native_in_isr;
 volatile int _native_in_syscall;
diff --git a/cpu/native/native_cpu.c b/cpu/native/native_cpu.c
index 44cfc0db6f..4ccc76472f 100644
--- a/cpu/native/native_cpu.c
+++ b/cpu/native/native_cpu.c
@@ -57,8 +57,6 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-extern volatile tcb_t *sched_active_thread;
-
 ucontext_t end_context;
 char __end_stack[SIGSTKSZ];
 
diff --git a/cpu/native/syscalls.c b/cpu/native/syscalls.c
index 668e7c0870..ff3e29b3b5 100644
--- a/cpu/native/syscalls.c
+++ b/cpu/native/syscalls.c
@@ -47,8 +47,6 @@
 #endif
 #include "debug.h"
 
-extern volatile tcb_t *sched_active_thread;
-
 ssize_t (*real_read)(int fd, void *buf, size_t count);
 ssize_t (*real_write)(int fd, const void *buf, size_t count);
 size_t (*real_fread)(void *ptr, size_t size, size_t nmemb, FILE *stream);