diff --git a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/parsers/ttcn3parser/Ttcn3Parser.g4 b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/parsers/ttcn3parser/Ttcn3Parser.g4
index 198f28281bd76484ececcdaeea31ccdae001d1fb..bce64086dcbe16a32f92a8b2048ce8ed053fac44 100644
--- a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/parsers/ttcn3parser/Ttcn3Parser.g4
+++ b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/parsers/ttcn3parser/Ttcn3Parser.g4
@@ -6464,6 +6464,9 @@ pr_ValueReference returns[Reference reference]
 			$reference.setLocation(getLocation( $start, getLastVisibleToken()));//TODO: maybe this can be improved too.
 		}
 	}
+	| th = pr_ThisKeyword {
+		$reference = new Reference(null, Reference.Ref_Type.REF_THIS);	
+	}
 );
 
 pr_AddressValue returns[Value value]