diff --git a/vlib/compiler/live.v b/vlib/compiler/live.v
index 7f286d4d7e..e8dc83f89b 100644
--- a/vlib/compiler/live.v
+++ b/vlib/compiler/live.v
@@ -29,6 +29,14 @@ fn (v &V) generate_hotcode_reloading_declarations() {
 	} else {
 		if v.pref.is_so {
 			cgen.genln('HANDLE live_fn_mutex;')
+			cgen.genln('
+void pthread_mutex_lock(HANDLE *m) {
+	WaitForSingleObject(*m, INFINITE);
+}
+
+void pthread_mutex_unlock(HANDLE *m) {
+	ReleaseMutex(*m);
+}')
 		}
 		if v.pref.is_live {
 			cgen.genln('HANDLE live_fn_mutex = 0;')
diff --git a/vlib/os/os.v b/vlib/os/os.v
index 77b040f0a4..f866fe0487 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -660,8 +660,10 @@ pub fn write_file(path, text string) {
 }
 
 pub fn clear() {
-	C.printf('\x1b[2J')
-	C.printf('\x1b[H')
+	$if !windows {
+		C.printf('\x1b[2J')
+		C.printf('\x1b[H')
+	}
 }
 
 fn on_segfault(f voidptr) {