diff --git a/fx/sys/rosetta/mutex.c b/fx/sys/rosetta/mutex.c
new file mode 100644
index 0000000..fcfd086
--- /dev/null
+++ b/fx/sys/rosetta/mutex.c
@@ -0,0 +1,17 @@
+#include <fx/thread.h>
+#include <pthread.h>
+
+bool fx_mutex_lock(fx_mutex *mut)
+{
+	return pthread_mutex_lock(mut) == 0;
+}
+
+bool fx_mutex_trylock(fx_mutex *mut)
+{
+	return pthread_mutex_trylock(mut) == 0;
+}
+
+bool fx_mutex_unlock(fx_mutex *mut)
+{
+	return pthread_mutex_trylock(mut) == 0;
+}