diff --git a/src/duct/src/CMakeLists.txt b/src/duct/src/CMakeLists.txt
index 23b55350f..4d2708dbb 100644
--- a/src/duct/src/CMakeLists.txt
+++ b/src/duct/src/CMakeLists.txt
@@ -12,7 +12,7 @@ set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -nostdlib -Wl,-bind_
 
 SET(duct_sources
 	commpage.c libnotify.c numcpus.c
-	CRGetCrashLogMessage.c acl.c bootstrap.c dns_sd.c
+	CRGetCrashLogMessage.c acl.c dns_sd.c
 	sa_dst_compare.c os_log.c)
 
 set(DYLIB_INSTALL_NAME "/usr/lib/system/libsystem_duct.dylib")
diff --git a/src/duct/src/bootstrap.c b/src/duct/src/bootstrap.c
deleted file mode 100644
index d1e4601b1..000000000
--- a/src/duct/src/bootstrap.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#if 0
-int bootstrap_parent()
-{
-	return 0;
-}
-
-void bootstrap_init(void)
-{
-}
-#endif
-
-void _libxpc_initializer(void)
-{
-}
-
diff --git a/src/kernel/libsyscall/mach/mach_init.c b/src/kernel/libsyscall/mach/mach_init.c
index a91264d48..b1ccdb435 100644
--- a/src/kernel/libsyscall/mach/mach_init.c
+++ b/src/kernel/libsyscall/mach/mach_init.c
@@ -61,6 +61,7 @@
 #include <machine/cpu_capabilities.h>
 #include <stdbool.h>
 #include "externs.h"
+#include <lkm/api.h>
 
 mach_port_t bootstrap_port = MACH_PORT_NULL;
 mach_port_t mach_task_self_ = MACH_PORT_NULL;
@@ -84,6 +85,7 @@ static void mach_init_doit(void);
 
 extern void _pthread_set_self(void *);
 extern void _init_cpu_capabilities(void);
+extern void lkm_call(int nr, void* arg);
 
 kern_return_t
 host_page_size(__unused host_t host, vm_size_t *out_page_size)
@@ -115,6 +117,11 @@ _mach_fork_child(void)
 	return 0;
 }
 
+void _mach_fork_parent(void)
+{
+	lkm_call(NR_fork_wait_for_child, NULL);
+}
+
 void
 mach_init_doit(void)
 {
diff --git a/src/lkm b/src/lkm
index 1488cec8e..67630fce3 160000
--- a/src/lkm
+++ b/src/lkm
@@ -1 +1 @@
-Subproject commit 1488cec8e1606f90342a96c5289ec054cb6f1670
+Subproject commit 67630fce3e293a9e71b06c050b574162b7bc3ea5