1 files changed, 1 insertions, 0 deletions
diff --git a/vm_sync.c b/vm_sync.c
index 41eab1b9e6..01c8505344 100644
--- a/vm_sync.c
+++ b/vm_sync.c
@@ -1,4 +1,5 @@
 #include "internal/gc.h"
+#include "internal/thread.h"
 #include "vm_core.h"
 #include "vm_sync.h"
 #include "ractor_core.h"