diff --git a/src/archive.cpp b/src/archive.cpp
index 444700c..c2894fe 100644
--- a/src/archive.cpp
+++ b/src/archive.cpp
@@ -176,6 +176,7 @@ std::generator<source_package_publishing_history> archive::getPublishedSources(
         {"status", !status.empty() ? status : ""},
         {"version", !version.empty() ? version : ""}
     };
+    params["ws.op"] = "getPublishedSources";
 
     // Remove empty entries
     for (auto it = params.begin(); it != params.end(); ) {