diff --git a/libc/kernel/uapi/drm/drm.h b/libc/kernel/uapi/drm/drm.h
index 251deeb..6863dc1 100644
--- a/libc/kernel/uapi/drm/drm.h
+++ b/libc/kernel/uapi/drm/drm.h
@@ -361,6 +361,7 @@
 #define DRM_CAP_ADDFB2_MODIFIERS 0x10
 #define DRM_CAP_PAGE_FLIP_TARGET 0x11
 #define DRM_CAP_CRTC_IN_VBLANK_EVENT 0x12
+#define DRM_CAP_SYNCOBJ 0x13
 struct drm_get_cap {
   __u64 capability;
   __u64 value;
@@ -379,6 +380,38 @@
   __u32 flags;
   __s32 fd;
 };
+struct drm_syncobj_create {
+  __u32 handle;
+#define DRM_SYNCOBJ_CREATE_SIGNALED (1 << 0)
+  __u32 flags;
+};
+struct drm_syncobj_destroy {
+  __u32 handle;
+  __u32 pad;
+};
+#define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE (1 << 0)
+#define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE (1 << 0)
+struct drm_syncobj_handle {
+  __u32 handle;
+  __u32 flags;
+  __s32 fd;
+  __u32 pad;
+};
+#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0)
+#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1)
+struct drm_syncobj_wait {
+  __u64 handles;
+  __s64 timeout_nsec;
+  __u32 count_handles;
+  __u32 flags;
+  __u32 first_signaled;
+  __u32 pad;
+};
+struct drm_syncobj_array {
+  __u64 handles;
+  __u32 count_handles;
+  __u32 pad;
+};
 #ifdef __cplusplus
 #endif
 #include "drm_mode.h"
@@ -477,6 +510,13 @@
 #define DRM_IOCTL_MODE_ATOMIC DRM_IOWR(0xBC, struct drm_mode_atomic)
 #define DRM_IOCTL_MODE_CREATEPROPBLOB DRM_IOWR(0xBD, struct drm_mode_create_blob)
 #define DRM_IOCTL_MODE_DESTROYPROPBLOB DRM_IOWR(0xBE, struct drm_mode_destroy_blob)
+#define DRM_IOCTL_SYNCOBJ_CREATE DRM_IOWR(0xBF, struct drm_syncobj_create)
+#define DRM_IOCTL_SYNCOBJ_DESTROY DRM_IOWR(0xC0, struct drm_syncobj_destroy)
+#define DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD DRM_IOWR(0xC1, struct drm_syncobj_handle)
+#define DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE DRM_IOWR(0xC2, struct drm_syncobj_handle)
+#define DRM_IOCTL_SYNCOBJ_WAIT DRM_IOWR(0xC3, struct drm_syncobj_wait)
+#define DRM_IOCTL_SYNCOBJ_RESET DRM_IOWR(0xC4, struct drm_syncobj_array)
+#define DRM_IOCTL_SYNCOBJ_SIGNAL DRM_IOWR(0xC5, struct drm_syncobj_array)
 #define DRM_COMMAND_BASE 0x40
 #define DRM_COMMAND_END 0xA0
 struct drm_event {