diff --git a/external/watch-mono b/external/watch-mono
index e4d33f70d401..7ebae4c7f57a 160000
--- a/external/watch-mono
+++ b/external/watch-mono
@@ -1 +1 @@
-Subproject commit e4d33f70d401e579cf5345a6eb777c673d3a5964
+Subproject commit 7ebae4c7f57a6c1b4d0a38e69f270a016b6f3143
diff --git a/runtime/exports.t4 b/runtime/exports.t4
index e12768ac512e..11db2682934f 100644
--- a/runtime/exports.t4
+++ b/runtime/exports.t4
@@ -516,13 +516,7 @@
 		#region mini/mini.h
 
 		new Export ("void*", "mono_jit_thread_attach",
-			"MonoDomain *", "domain",
-			"void *", "dummy"
-		),
-
-		new Export ("void", "mono_jit_thread_detach",
-			"void *", "cookie",
-			"void *", "dummy"
+			"MonoDomain *", "domain"
 		),
 
 		new Export ("gboolean", "mono_exception_walk_trace",
@@ -601,6 +595,20 @@
 		#region utils/mono-threads.h
 		new Export ("void*", "mono_thread_info_current_unchecked" ),
 		#endregion
+
+		#region metadata/threads-types.h
+
+		new Export (true, "void *", "mono_threads_attach_coop",
+			"MonoDomain *", "domain",
+			"gpointer*", "dummy"
+		),
+
+		new Export (true, "void *", "mono_threads_detach_coop",
+			"gpointer", "cookie",
+			"gpointer*", "dummy"
+		),
+
+		#endregion
 	};
 #><#+
 	class Arg
diff --git a/runtime/xamarin/runtime.h b/runtime/xamarin/runtime.h
index e19ae3106171..8ae912a55de5 100644
--- a/runtime/xamarin/runtime.h
+++ b/runtime/xamarin/runtime.h
@@ -258,15 +258,26 @@ class XamarinObject {
 
 #endif /* !TARGET_OS_WATCH */
 
+// Once we have one mono clone again the TARGET_OS_WATCH
+// should be removed (DYNAMIC_MONO_RUNTIME should still
+// be here though).
+#if TARGET_OS_WATCH || DYNAMIC_MONO_RUNTIME
 #define MONO_THREAD_ATTACH \
 	do { \
 		gpointer __thread_dummy; \
-		gpointer __thread_cookie = mono_jit_thread_attach (NULL, &__thread_dummy) \
+		gpointer __thread_cookie = mono_threads_attach_coop (NULL, &__thread_dummy) \
 
 #define MONO_THREAD_DETACH \
-		mono_jit_thread_detach (__thread_cookie, &__thread_dummy); \
+		mono_threads_detach_coop (__thread_cookie, &__thread_dummy); \
 	} while (0)
+#else
+#define MONO_THREAD_ATTACH \
+	do { \
+		mono_jit_thread_attach (NULL) \
 
+#define MONO_THREAD_DETACH \
+	} while (0)
+#endif
 
 #ifdef __cplusplus
 } /* extern "C" */