diff --git a/src/broadcom/vulkan/v3dv_bo.c b/src/broadcom/vulkan/v3dv_bo.c
index 2728a9233f9..594401edd82 100644
--- a/src/broadcom/vulkan/v3dv_bo.c
+++ b/src/broadcom/vulkan/v3dv_bo.c
@@ -419,9 +419,11 @@ v3dv_bo_cache_init(struct v3dv_device *device)
       fprintf(stderr, "MAX BO CACHE SIZE: %iMB\n", device->bo_cache.max_cache_size);
    }
 
+   mtx_lock(&device->bo_cache.lock);
    device->bo_cache.max_cache_size *= 1024 * 1024;
    device->bo_cache.cache_count = 0;
    device->bo_cache.cache_size = 0;
+   mtx_unlock(&device->bo_cache.lock);
 }
 
 void