diff --git a/packages/common/http/src/params.ts b/packages/common/http/src/params.ts
index 39c0d31947..d43d91adbd 100755
--- a/packages/common/http/src/params.ts
+++ b/packages/common/http/src/params.ts
@@ -109,7 +109,7 @@ export interface HttpParamsOptions {
   fromString?: string;
 
   /** Object map of the HTTP parameters. Mutually exclusive with `fromString`. */
-  fromObject?: {[param: string]: string | string[]};
+  fromObject?: {[param: string]: string | ReadonlyArray<string>};
 
   /** Encoding codec used to parse and serialize the parameters. */
   encoder?: HttpParameterCodec;