diff --git a/terraform/scripts/stage_talos_image.py b/terraform/scripts/stage_talos_image.py
index dada3b3..1e01815 100644
--- a/terraform/scripts/stage_talos_image.py
+++ b/terraform/scripts/stage_talos_image.py
@@ -53,6 +53,7 @@ def ensure_image(base_url, token, node, storage, image_url, filename, network_co
 
     if network_config_path:
         build_custom_iso(base_url, token, node, storage, source_filename, filename, network_config_path)
+        wait_for_storage_content(base_url, token, node, storage, filename)
 
     response = api_request(base_url, token, "GET", content_path)
     for item in response.get("data", []):
@@ -79,6 +80,16 @@ def wait_for_task(base_url, token, node, upid):
     raise RuntimeError("timed out waiting for ISO download task to finish")
 
 
+def wait_for_storage_content(base_url, token, node, storage, filename):
+    content_path = f"/api2/json/nodes/{node}/storage/{storage}/content"
+    for _ in range(180):
+        response = api_request(base_url, token, "GET", content_path)
+        if any(item.get("volid", "").endswith(filename) for item in response.get("data", [])):
+            return
+        time.sleep(2)
+    raise RuntimeError(f"timed out waiting for {filename} to appear in {node}/{storage}")
+
+
 def detect_proxmox_iso_dir(storage):
     candidates = [
         Path("/var/lib/vz/template/iso"),