diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index bb6adeb0534..fcda05d2d42 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -834,7 +834,7 @@ struct x11_image {
    uint32_t                                  sync_fence;
    uint32_t                                  serial;
    xcb_shm_seg_t                             shmseg;
-   uint32_t                                  shmid;
+   int                                       shmid;
    uint8_t *                                 shmaddr;
 };