diff --git a/src/freedreno/drm/msm/msm_ringbuffer_sp.c b/src/freedreno/drm/msm/msm_ringbuffer_sp.c
index 5fd0dfeac54..96e7462df62 100644
--- a/src/freedreno/drm/msm/msm_ringbuffer_sp.c
+++ b/src/freedreno/drm/msm/msm_ringbuffer_sp.c
@@ -120,7 +120,7 @@ flush_submit_list(struct list_head *submit_list)
     * NOTE allocate on-stack in the common case, but with an upper-
     * bound to limit on-stack allocation to 4k:
     */
-   const unsigned bo_limit = sizeof(struct drm_msm_gem_submit_bo) / 4096;
+   const unsigned bo_limit = 4096 / sizeof(struct drm_msm_gem_submit_bo);
    bool bos_on_stack = fd_submit->nr_bos < bo_limit;
    struct drm_msm_gem_submit_bo
       _submit_bos[bos_on_stack ? fd_submit->nr_bos : 0];
diff --git a/src/freedreno/drm/virtio/virtio_ringbuffer.c b/src/freedreno/drm/virtio/virtio_ringbuffer.c
index 8744be3a49a..ccae5da1d9c 100644
--- a/src/freedreno/drm/virtio/virtio_ringbuffer.c
+++ b/src/freedreno/drm/virtio/virtio_ringbuffer.c
@@ -121,7 +121,7 @@ flush_submit_list(struct list_head *submit_list)
     * NOTE allocate on-stack in the common case, but with an upper-
     * bound to limit on-stack allocation to 4k:
     */
-   const unsigned bo_limit = sizeof(struct drm_msm_gem_submit_bo) / 4096;
+   const unsigned bo_limit = 4096 / sizeof(struct drm_msm_gem_submit_bo);
    bool bos_on_stack = fd_submit->nr_bos < bo_limit;
    struct drm_msm_gem_submit_bo
       _submit_bos[bos_on_stack ? fd_submit->nr_bos : 0];