diff --git a/src/jrd/EngineInterface.h b/src/jrd/EngineInterface.h
index 44f17ada61..6cb9b85ef6 100644
--- a/src/jrd/EngineInterface.h
+++ b/src/jrd/EngineInterface.h
@@ -73,6 +73,11 @@ public:
 		return blob;
 	}
 
+	void clearHandle()
+	{
+		blob = NULL;
+	}
+
 private:
 	blb* blob;
 	Firebird::RefPtr<StableAttachmentPart> sAtt;
diff --git a/src/jrd/blb.cpp b/src/jrd/blb.cpp
index 6d61d2208c..1afd299d57 100644
--- a/src/jrd/blb.cpp
+++ b/src/jrd/blb.cpp
@@ -2669,6 +2669,9 @@ void blb::destroy(const bool purge_flag)
 			// in tra_blobs
 			fb_assert(false);
 		}
+
+		if (blb_interface)
+			blb_interface->clearHandle();
 	}
 
 	delete blb_pages;