diff --git a/src/repart/repart.c b/src/repart/repart.c
index 84aaf60b5f..168092d43a 100644
--- a/src/repart/repart.c
+++ b/src/repart/repart.c
@@ -10937,13 +10937,13 @@ static int vl_method_run(
                 void *userdata) {
 
         static const sd_json_dispatch_field dispatch_table[] = {
-                { "node",                        SD_JSON_VARIANT_STRING,  sd_json_dispatch_string,  offsetof(RunParameters, node),                           SD_JSON_NULLABLE                 },
-                { "empty",                       SD_JSON_VARIANT_STRING,  json_dispatch_empty_mode, offsetof(RunParameters, empty),                          SD_JSON_MANDATORY                },
-                { "seed",                        SD_JSON_VARIANT_STRING,  sd_json_dispatch_id128,   offsetof(RunParameters, seed),                           SD_JSON_NULLABLE                 },
-                { "dryRun",                      SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, dry_run),                        SD_JSON_MANDATORY                },
-                { "definitions",                 SD_JSON_VARIANT_ARRAY,   json_dispatch_strv_path,  offsetof(RunParameters, definitions),                    SD_JSON_MANDATORY|SD_JSON_STRICT },
-                { "deferPartitionsEmpty",        SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, defer_partitions_empty),         SD_JSON_NULLABLE                 },
-                { "deferPartitionsFactoryReset", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, defer_partitions_factory_reset), SD_JSON_NULLABLE                 },
+                { "node",                        SD_JSON_VARIANT_STRING,  sd_json_dispatch_string,  offsetof(RunParameters, node),                           SD_JSON_NULLABLE  },
+                { "empty",                       SD_JSON_VARIANT_STRING,  json_dispatch_empty_mode, offsetof(RunParameters, empty),                          SD_JSON_MANDATORY },
+                { "seed",                        SD_JSON_VARIANT_STRING,  sd_json_dispatch_id128,   offsetof(RunParameters, seed),                           SD_JSON_NULLABLE  },
+                { "dryRun",                      SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, dry_run),                        SD_JSON_MANDATORY },
+                { "definitions",                 SD_JSON_VARIANT_ARRAY,   json_dispatch_strv_path,  offsetof(RunParameters, definitions),                    SD_JSON_STRICT    },
+                { "deferPartitionsEmpty",        SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, defer_partitions_empty),         SD_JSON_NULLABLE  },
+                { "deferPartitionsFactoryReset", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(RunParameters, defer_partitions_factory_reset), SD_JSON_NULLABLE  },
                 {}
         };
 
diff --git a/src/shared/varlink-io.systemd.Repart.c b/src/shared/varlink-io.systemd.Repart.c
index dbfb8d0360..287af1f150 100644
--- a/src/shared/varlink-io.systemd.Repart.c
+++ b/src/shared/varlink-io.systemd.Repart.c
@@ -41,7 +41,7 @@ static SD_VARLINK_DEFINE_METHOD_FULL(
                 SD_VARLINK_FIELD_COMMENT("The seed value to derive partition and file system UUIDs from"),
                 SD_VARLINK_DEFINE_INPUT(seed, SD_VARLINK_STRING, SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("Path to directory containing definition files."),
-                SD_VARLINK_DEFINE_INPUT(definitions, SD_VARLINK_STRING, SD_VARLINK_ARRAY),
+                SD_VARLINK_DEFINE_INPUT(definitions, SD_VARLINK_STRING, SD_VARLINK_ARRAY|SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("If true, automatically defer creation of all partitions whose label is \"empty\"."),
                 SD_VARLINK_DEFINE_INPUT(deferPartitionsEmpty, SD_VARLINK_BOOL, SD_VARLINK_NULLABLE),
                 SD_VARLINK_FIELD_COMMENT("If true, automatically defer creation of all partitions which are marked for factory reset."),