diff --git a/scripts/hello_world.toy b/scripts/hello_world.toy
index 30471b6..4b018ae 100644
--- a/scripts/hello_world.toy
+++ b/scripts/hello_world.toy
@@ -1,6 +1,20 @@
-print "Hello world";
 
-var answer = 42;
-var question = 69;
 
-print answer + question;
\ No newline at end of file
+/*
+{
+	fn hello() {
+		print "Hello world";
+	}
+	hello();
+}
+*/
+
+{
+	fn hello(arg) {
+		print arg;
+	}
+
+	hello("world");
+}
+
+
diff --git a/source/toy_compiler.c b/source/toy_compiler.c
index ff8aedf..3caf966 100644
--- a/source/toy_compiler.c
+++ b/source/toy_compiler.c
@@ -209,7 +209,7 @@ static unsigned int emitParameters(Toy_Bytecode* mb, Toy_Ast* ast) {
 
 	//emit to the param index
 	EMIT_INT(&mb, param, dataAddr);
-	EMIT_INT(&mb, param, TOY_VALUE_UNKNOWN); //TODO: encode function parameter types properly
+	EMIT_INT(&mb, param, ast->value.value.type);
 
 	//this returns the number of written parameters
 	return 1;