diff --git a/linux/thread.c b/linux/thread.c
index 253685f..20f83b8 100644
--- a/linux/thread.c
+++ b/linux/thread.c
@@ -14,17 +14,20 @@
 
 sigset_t mask;
 
-void reset_procmask(void) {
+void
+reset_procmask(void) {
     sigemptyset (&mask);
 	sigaddset (&mask, SIGALRM);
     sigprocmask(SIG_UNBLOCK, &mask, NULL);
 }
 
-int get_fake_if(ucontext_t *ctx) {
+int
+get_fake_if(ucontext_t *ctx) {
     // we fake IF with ID flag
     return !(ctx->uc_mcontext.__gregs[REG_EFL] & (1 << 21));
 }
 
-void system_shutdown(void) {
+void
+system_shutdown(void) {
     exit(0);
 }
diff --git a/umka.asm b/umka.asm
index 4500dfc..1f130ba 100644
--- a/umka.asm
+++ b/umka.asm
@@ -88,7 +88,7 @@ pubsym irq_serv.irq_10, 'kos_irq_serv_irq10'
 pubsym idts, 'kos_idts'
 pubsym attach_int_handler, 'kos_attach_int_handler', 12
 pubsym fs_execute, 'kos_fs_execute', 4
-pubsym set_keyboard_data, 'kos_set_keyboard_data'
+pubsym set_keyboard_data, 'kos_set_keyboard_data', no_mangle
 pubsym KEY_COUNT, 'kos_key_count'
 pubsym KEY_BUFF, 'kos_key_buff'
 pubsym keyboard_mode, 'kos_keyboard_mode'
@@ -153,7 +153,7 @@ pubsym mem_BACKGROUND
 pubsym sys_background
 pubsym REDRAW_BACKGROUND, 'kos_redraw_background'
 pubsym new_sys_threads, 'kos_new_sys_threads', no_mangle
-pubsym osloop, 'kos_osloop'
+pubsym osloop, 'kos_osloop', no_mangle
 pubsym set_mouse_data, 'kos_set_mouse_data', 20
 pubsym scheduler_current, 'kos_scheduler_current'
 pubsym kos_eth_input
diff --git a/windows/thread.c b/windows/thread.c
index 7addeb8..9e7a171 100755
--- a/windows/thread.c
+++ b/windows/thread.c
@@ -7,13 +7,21 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
 
-void reset_procmask(void) {
+void
+reset_procmask(void) {
     printf("STUB: %s:%d", __FILE__, __LINE__);
 }
 
-int get_fake_if(void *ctx) {
+int
+get_fake_if(void *ctx) {
     (void)ctx;
     printf("STUB: %s:%d", __FILE__, __LINE__);
     return 0;
 }
+
+void
+system_shutdown(void) {
+    exit(0);
+}