diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index c128732f04..c40121599f 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -1160,7 +1160,7 @@ pub fn (mut c Checker) call_method(mut call_expr ast.CallExpr) table.Type {
 				table.FnType { ret_type = arg_sym.info.func.return_type }
 				else { ret_type = arg_type }
 			}
-			call_expr.return_type = c.table.find_or_register_array(ret_type, 1, c.mod)
+			call_expr.return_type = c.table.find_or_register_array(ret_type, 1)
 		} else if method_name == 'filter' {
 			// check fn
 			c.check_map_and_filter(false, elem_typ, call_expr)
@@ -1608,7 +1608,7 @@ pub fn (mut c Checker) call_fn(mut call_expr ast.CallExpr) table.Type {
 			elem_info := return_sym.info as table.Array
 			elem_sym := c.table.get_type_symbol(elem_info.elem_type)
 			if elem_sym.source_name == 'T' {
-				idx := c.table.find_or_register_array(call_expr.generic_type, 1, return_sym.mod)
+				idx := c.table.find_or_register_array(call_expr.generic_type, 1)
 				return table.new_type(idx)
 			}
 		}
@@ -2393,8 +2393,7 @@ pub fn (mut c Checker) array_init(mut array_init ast.ArrayInit) table.Type {
 				1)
 			array_init.typ = table.new_type(idx)
 		} else {
-			sym := c.table.get_type_symbol(elem_type)
-			idx := c.table.find_or_register_array(elem_type, 1, sym.mod)
+			idx := c.table.find_or_register_array(elem_type, 1)
 			array_init.typ = table.new_type(idx)
 		}
 		array_init.elem_type = elem_type
@@ -4191,7 +4190,7 @@ pub fn (mut c Checker) index_expr(mut node ast.IndexExpr) table.Type {
 		// fixed_array[1..2] => array
 		if typ_sym.kind == .array_fixed {
 			elem_type := c.table.value_type(typ)
-			idx := c.table.find_or_register_array(elem_type, 1, c.mod)
+			idx := c.table.find_or_register_array(elem_type, 1)
 			return table.new_type(idx)
 		}
 		return typ.set_nr_muls(0)
@@ -4542,21 +4541,6 @@ fn (mut c Checker) fn_decl(mut node ast.FnDecl) {
 		// if sym.has_method(node.name) {
 		// c.warn('duplicate method `$node.name`', node.pos)
 		// }
-		// Do not allow to modify types from other modules
-		if sym.mod != c.mod && !c.is_builtin_mod && sym.mod != '' { // TODO remove != ''
-			// remove the method to hide other related errors (`method is private` etc)
-			mut idx := 0
-			for i, m in sym.methods {
-				if m.name == node.name {
-					idx = i
-					break
-				}
-			}
-			sym.methods.delete(idx)
-			//
-			c.error('cannot define new methods on non-local `$sym.source_name` (' +
-				'current module is `$c.mod`, `$sym.source_name` is from `$sym.mod`)', node.pos)
-		}
 		// needed for proper error reporting during vweb route checking
 		sym.methods[node.method_idx].source_fn = voidptr(node)
 	}
diff --git a/vlib/v/fmt/tests/match_range_expression_branches_keep.vv b/vlib/v/fmt/tests/match_range_expression_branches_keep.vv
index d557ddb0c8..ae99b0ff35 100644
--- a/vlib/v/fmt/tests/match_range_expression_branches_keep.vv
+++ b/vlib/v/fmt/tests/match_range_expression_branches_keep.vv
@@ -1,4 +1,4 @@
-pub fn (b byte) str_escaped() string {
+pub fn str_escaped(b byte) string {
 	str := match b {
 		0 { '`\\' + '0`' } // Bug is preventing \\0 in a literal
 		7 { '`\\a`' }
diff --git a/vlib/v/parser/containers.v b/vlib/v/parser/containers.v
index 1655e942c5..2b92b4cc40 100644
--- a/vlib/v/parser/containers.v
+++ b/vlib/v/parser/containers.v
@@ -30,10 +30,9 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		if p.tok.kind in [.name, .amp, .lsbr] && p.tok.line_nr == line_nr {
 			elem_type_pos = p.tok.position()
 			elem_type = p.parse_type()
-			sym := p.table.get_type_symbol(elem_type)
 			// this is set here because it's a known type, others could be the
 			// result of expr so we do those in checker
-			idx := p.table.find_or_register_array(elem_type, 1, sym.mod)
+			idx := p.table.find_or_register_array(elem_type, 1)
 			array_type = table.new_type(idx)
 			has_type = true
 		}
diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index 161eaf1933..19f8f5b696 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -273,6 +273,12 @@ fn (mut p Parser) fn_decl() ast.FnDecl {
 	if is_method {
 		mut type_sym := p.table.get_type_symbol(rec_type)
 		ret_type_sym := p.table.get_type_symbol(return_type)
+		// Do not allow to modify / add methods to types from other modules
+		// arrays/maps dont belong to a module only their element types do
+		// we could also check if kind is .array,  .array_fixed, .map instead of mod.len
+		if type_sym.mod.len > 0 && type_sym.mod != p.mod && type_sym.language == .v {
+			p.error('cannot define new methods on non-local type $type_sym.name')
+		}
 		// p.warn('reg method $type_sym.name . $name ()')
 		type_sym_method_idx = type_sym.register_method(table.Fn{
 			name: name
diff --git a/vlib/v/parser/parse_type.v b/vlib/v/parser/parse_type.v
index 87194f5697..53a2c4e219 100644
--- a/vlib/v/parser/parse_type.v
+++ b/vlib/v/parser/parse_type.v
@@ -29,8 +29,7 @@ pub fn (mut p Parser) parse_array_type() table.Type {
 		p.check(.rsbr)
 		nr_dims++
 	}
-	sym := p.table.get_type_symbol(elem_type)
-	idx := p.table.find_or_register_array(elem_type, nr_dims, sym.mod)
+	idx := p.table.find_or_register_array(elem_type, nr_dims)
 	return table.new_type(idx)
 }
 
diff --git a/vlib/v/parser/sql.v b/vlib/v/parser/sql.v
index 63268058a5..13c4387de1 100644
--- a/vlib/v/parser/sql.v
+++ b/vlib/v/parser/sql.v
@@ -76,7 +76,7 @@ fn (mut p Parser) sql_expr() ast.Expr {
 	}
 	if !query_one && !is_count {
 		// return an array
-		typ = table.new_type(p.table.find_or_register_array(table_type, 1, p.mod))
+		typ = table.new_type(p.table.find_or_register_array(table_type, 1))
 	} else if !is_count {
 		// return a single object
 		// TODO optional
diff --git a/vlib/v/table/table.v b/vlib/v/table/table.v
index 4192176c3d..321710db2b 100644
--- a/vlib/v/table/table.v
+++ b/vlib/v/table/table.v
@@ -539,7 +539,7 @@ pub fn (mut t Table) find_or_register_map(key_type Type, value_type Type) int {
 	return t.register_type_symbol(map_typ)
 }
 
-pub fn (mut t Table) find_or_register_array(elem_type Type, nr_dims int, mod string) int {
+pub fn (mut t Table) find_or_register_array(elem_type Type, nr_dims int) int {
 	name := t.array_name(elem_type, nr_dims)
 	source_name := t.array_source_name(elem_type)
 	// existing
@@ -558,7 +558,6 @@ pub fn (mut t Table) find_or_register_array(elem_type Type, nr_dims int, mod str
 			elem_type: elem_type
 			nr_dims: nr_dims
 		}
-		mod: mod
 	}
 	return t.register_type_symbol(array_type)
 }