diff --git a/AlgebraicDataflowArchitectureModel/src/parser/Parser.java b/AlgebraicDataflowArchitectureModel/src/parser/Parser.java
index 080f7da..a7c9fb5 100644
--- a/AlgebraicDataflowArchitectureModel/src/parser/Parser.java
+++ b/AlgebraicDataflowArchitectureModel/src/parser/Parser.java
@@ -324,6 +324,9 @@
 							} else {
 								exp = new Constant(symbolName, DataTransferModel.typeInt);
 							}
+						} else if (symbolName.startsWith("\"") && symbolName.endsWith("\"")) {
+							// a string value
+							exp = new Constant(symbolName, DataTransferModel.typeString);
 						} else {
 							// a variable
 							exp = parseVariable(stream, model, symbolName);