diff --git a/examples/hello.v b/examples/hello.v
index c97c934..44821b4 100644
--- a/examples/hello.v
+++ b/examples/hello.v
@@ -54,9 +54,10 @@ fn main(a int) int {
 
 	str := 'hello' 
 	len := str.len
+
+	// those should yield the same ast
 	str.len = str.len + 1
-	x += 1
-	// str.len += 1
+	str.len += 1
 }
 
 fn (v Typ) voidfunc() {}
diff --git a/src/parser.zig b/src/parser.zig
index f3f8605..b0e096b 100644
--- a/src/parser.zig
+++ b/src/parser.zig
@@ -751,21 +751,23 @@ pub const Parser = struct {
                         return Result.CompileError;
                     },
 
-                    //.PlusEqual => {
-                    //    var plus_op = try self.mkToken(.Plus, "+", op.line);
-                    //    return try self.mkAssign(
-                    //        expr.Variable,
-                    //        try self.mkBinary(expr, plus_op, value),
-                    //    );
-                    //},
+                    .PlusEqual => {
+                        var new_op = try self.mkToken(.Plus, "+", op.line);
+                        return try self.mkSet(
+                            get.struc,
+                            get.name,
+                            try self.mkBinary(expr, new_op, value),
+                        );
+                    },
 
-                    //.MinusEqual => {
-                    //    var new_op = try self.mkToken(.Minus, "-", op.line);
-                    //    return try self.mkSet(
-                    //        get.struc, get.name,
-                    //        try self.mkBinary(expr, new_op, value),
-                    //    );
-                    //},
+                    .MinusEqual => {
+                        var new_op = try self.mkToken(.Minus, "-", op.line);
+                        return try self.mkSet(
+                            get.struc,
+                            get.name,
+                            try self.mkBinary(expr, new_op, value),
+                        );
+                    },
 
                     .Equal => return try self.mkSet(get.struc, get.name, value),
                     else => unreachable,