diff --git a/leaflet/leaflet.d.ts b/leaflet/leaflet.d.ts
index 94cbe8499a..98c1ce9ad3 100644
--- a/leaflet/leaflet.d.ts
+++ b/leaflet/leaflet.d.ts
@@ -4091,7 +4091,7 @@ declare namespace L {
           *
           * Default value: 'abc'.
           */
-        subdomains?: string[];
+        subdomains?: string|string[];
 
         /**
           * URL to the tile image to show in place of the tile that failed to load.