diff --git a/in/simple.asl b/in/simple.asl
index aff052d..a2589de 100644
--- a/in/simple.asl
+++ b/in/simple.asl
@@ -1,3 +1,3 @@
-func myFunc(a, b) {
+func myFunc(a = 1, b = "string") {
     // ...
 }
diff --git a/src/asl/parser.go b/src/asl/parser.go
index ae03fd9..6aab297 100644
--- a/src/asl/parser.go
+++ b/src/asl/parser.go
@@ -223,7 +223,15 @@ func parseFunctionParameter() {
 	for !accept(")") {
 		name := get().token
 		next()
-		appendOut("\""+name+"\"", false)
+		
+		if accept("=") {
+		    next()
+		    value := get().token
+		    next()
+		    appendOut("[\""+name+"\","+value+"]", false)
+		} else {
+		    appendOut("\""+name+"\"", false)
+		}
 
 		if !accept(")") {
 			expect(",")
diff --git a/src/asl/parser_test.go b/src/asl/parser_test.go
index 84913f3..5657977 100644
--- a/src/asl/parser_test.go
+++ b/src/asl/parser_test.go
@@ -139,6 +139,13 @@ func TestParserArray(t *testing.T) {
 	equal(t, got, want)
 }
 
+func TestParserFunctionParams(t *testing.T) {
+	got := getCompiled(t, "test/parser_func_params.asl")
+	want := "myFunc = {\r\nparams [[\"a\",1],[\"b\",2]];\r\nreturn a+b;\r\n};\r\n"
+
+	equal(t, got, want)
+}
+
 func getCompiled(t *testing.T, file string) string {
 	code, err := ioutil.ReadFile(file)
 
diff --git a/test/parser_func_params.asl b/test/parser_func_params.asl
new file mode 100644
index 0000000..352b44a
--- /dev/null
+++ b/test/parser_func_params.asl
@@ -0,0 +1,3 @@
+func myFunc(a = 1, b = 2) {
+    return a+b;
+}