diff --git a/prism/src/automata/DA.java b/prism/src/automata/DA.java
index 7b3bc5b4..8d338329 100644
--- a/prism/src/automata/DA.java
+++ b/prism/src/automata/DA.java
@@ -320,6 +320,10 @@ public class DA<Symbol, Acceptance extends AcceptanceOmega>
 		case "dot":
 			printDot(out);
 			break;
+		// Default to txt
+		default:
+			out.println(toString());
+			break;
 		}
 	}
 
@@ -338,6 +342,10 @@ public class DA<Symbol, Acceptance extends AcceptanceOmega>
 		case "hoa":
 			printHOA(out);
 			break;
+		// Default to txt
+		default:
+			out.println(toString());
+			break;
 		}
 	}