diff --git a/types/wlr_export_dmabuf_v1.c b/types/wlr_export_dmabuf_v1.c
index 1b284c44..cbd54749 100644
--- a/types/wlr_export_dmabuf_v1.c
+++ b/types/wlr_export_dmabuf_v1.c
@@ -45,7 +45,7 @@ static void frame_output_handle_swap_buffers(struct wl_listener *listener,
 	wl_list_remove(&frame->output_swap_buffers.link);
 	wl_list_init(&frame->output_swap_buffers.link);
 
-	uint32_t tv_sec_hi = event->when->tv_sec << 32;
+	uint32_t tv_sec_hi = event->when->tv_sec >> 32;
 	uint32_t tv_sec_lo = event->when->tv_sec & 0xFFFFFFFF;
 	zwlr_export_dmabuf_frame_v1_send_ready(frame->resource,
 		tv_sec_hi, tv_sec_lo, event->when->tv_nsec);