diff --git a/artiq/coredevice/coredevice_generic.schema.json b/artiq/coredevice/coredevice_generic.schema.json
index 951184881..d2c9a6abd 100644
--- a/artiq/coredevice/coredevice_generic.schema.json
+++ b/artiq/coredevice/coredevice_generic.schema.json
@@ -383,7 +383,8 @@
                             "maxItems": 2
                         },
                         "sampler_hw_rev": {
-                            "type": "string"
+                            "type": "string",
+                            "pattern": "^v[0-9]+\\.[0-9]+"
                         },
                         "urukul0_ports": {
                             "type": "array",