diff --git a/lib/icinga/pluginutility.cpp b/lib/icinga/pluginutility.cpp
index 41ad0fa92..84239fc9e 100644
--- a/lib/icinga/pluginutility.cpp
+++ b/lib/icinga/pluginutility.cpp
@@ -126,8 +126,10 @@ void PluginUtility::ExecuteCommand(const Command::Ptr& commandObj, const Checkab
 
 					if (callback) {
 						ProcessResult pr;
+						pr.PID = -1;
 						pr.ExecutionStart = Utility::GetTime();
 						pr.ExecutionStart = pr.ExecutionStart;
+						pr.ExitStatus = 3; /* Unknown */
 						pr.Output = message;
 						callback(Empty, pr);
 					}