diff --git a/src/mallob_ipasir.cpp b/src/mallob_ipasir.cpp
index e0ee7d6..fdc831e 100644
--- a/src/mallob_ipasir.cpp
+++ b/src/mallob_ipasir.cpp
@@ -112,7 +112,7 @@ void MallobIpasir::destruct() {
         {"done", true}
     };
     if (_revision > 0) {
-        j["precursor"] = getJobName(_revision-1);
+        j["precursor"] = "ipasir." + getJobName(_revision-1);
     }
     std::string jsonFilename = _api_directory + "/new/ipasir." + jobName + ".json";
     std::ofstream o(jsonFilename);