diff --git a/src/jrd/jrd.cpp b/src/jrd/jrd.cpp
index d500d0fb37..b9689e8eef 100644
--- a/src/jrd/jrd.cpp
+++ b/src/jrd/jrd.cpp
@@ -959,7 +959,15 @@ void Trigger::release(thread_db* tdbb)
 		extTrigger = NULL;
 	}
 
-	if (sysTrigger || !statement || statement->isActive() || releaseInProgress)
+	// dimitr:	We should never release triggers created by MET_parse_sys_trigger().
+	//			System triggers do have BLR, but it's not stored inside the trigger object.
+	//			However, triggers backing RI constraints are also marked as system,
+	//			but they are loaded in a regular way and their BLR is present here.
+	//			This is why we cannot simply check for sysTrigger, sigh.
+
+	const bool sysTableTrigger = (blr.isEmpty() && engine.isEmpty());
+
+	if (sysTableTrigger || !statement || statement->isActive() || releaseInProgress)
 		return;
 
 	AutoSetRestore<bool> autoProgressFlag(&releaseInProgress, true);