diff --git a/Triangle.Compiler/src/main/java/triangle/Compiler.java b/Triangle.Compiler/src/main/java/triangle/Compiler.java
index 9b5cbe4..90fb3c1 100644
--- a/Triangle.Compiler/src/main/java/triangle/Compiler.java
+++ b/Triangle.Compiler/src/main/java/triangle/Compiler.java
@@ -33,6 +33,8 @@ public class Compiler {
 
 	/** The filename for the object program, normally obj.tam. */
 	static String objectName = "obj.tam";
+	
+	static boolean showTree = false;
 
 	private static Scanner scanner;
 	private static Parser parser;
@@ -114,16 +116,29 @@ public class Compiler {
 	public static void main(String[] args) {
 
 		if (args.length < 1) {
-			System.out.println("Usage: tc filename [tree]");
+			System.out.println("Usage: tc filename [-o=outputfilename] [tree]");
 			System.exit(1);
 		}
+		
+		parseArgs(args);
 
 		String sourceName = args[0];
-		boolean tree = (args.length > 1 && args[1].equalsIgnoreCase("tree"));
-		var compiledOK = compileProgram(sourceName, objectName, tree, false);
+		
+		var compiledOK = compileProgram(sourceName, objectName, showTree, false);
 
-		if (!tree) {
+		if (!showTree) {
 			System.exit(compiledOK ? 0 : 1);
 		}
 	}
+	
+	private static void parseArgs(String[] args) {
+		for (String s : args) {
+			var sl = s.toLowerCase();
+			if (sl.equals("tree")) {
+				showTree = true;
+			} else if (sl.startsWith("-o=")) {
+				objectName = s.substring(3);
+			}
+		}
+	}
 }