1 files changed, 6 insertions, 0 deletions
diff --git a/py/runtime.c b/py/runtime.c
index 7f28abbf4f..f88c92be63 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -91,6 +91,12 @@ void mp_init(void) {
     // start with no extensions to builtins
     MP_STATE_VM(mp_module_builtins_override_dict) = NULL;
     #endif
+
+    #if MICROPY_PY_THREAD_GIL
+    mp_thread_mutex_init(&MP_STATE_VM(gil_mutex));
+    #endif
+
+    MP_THREAD_GIL_ENTER();
 }
 
 void mp_deinit(void) {