diff --git a/libc/kernel/common/linux/sync.h b/libc/kernel/common/linux/sync.h
index 63c1cc8..a2748e8 100644
--- a/libc/kernel/common/linux/sync.h
+++ b/libc/kernel/common/linux/sync.h
@@ -44,7 +44,7 @@
  __u8 pt_info[0];
 };
 #define SYNC_IOC_MAGIC '>'
-#define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __u32)
+#define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __s32)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 1, struct sync_merge_data)
 #define SYNC_IOC_FENCE_INFO _IOWR(SYNC_IOC_MAGIC, 2,  struct sync_fence_info_data)